CFM Corporation Ventilation Hood PVS 1 User Manual

Power Venting System  
Model: PVS-1  
for use with  
Decorative Gas Appliance Models:  
NVC33VN/VP, NVC36VN/VP,  
NVC39VN/VP, NVC43VN/VP  
INSTALLER/CONSUMER  
SAFETY INFORMATION  
PLEASE READ THIS MANUAL  
BEFORE INSTALLING AND USING  
APPLIANCE  
WARNING: If the information in this  
manual is not followed exactly, a fire  
or explosion may result causing prop-  
erty damage, personal injury or loss of  
life.  
FOR YOUR SAFETY  
Installation and service must be per-  
formed by a qualified installer, service  
agency, or the gas supplier.  
Do not store or use gasoline or other  
flammable vapors and liquids in the  
vicinity of this or any other appliance.  
FOR YOUR SAFETY  
If you smell gas:  
Homeowner’s Installation &  
Operating Manual  
Do not try to light any appliance.  
Do not touch any electric switch; do  
not use any phone in your building.  
Immediately call your gas supplier  
from your neighbors phone. Follow  
the gas supplier’s instructions.  
If you cannot reach your gas supplier,  
call the fire department.  
Open windows / Extinguish all flames.  
CERTIFIED  
I
PLEASE KEEP THIS MANUAL FOR FUTURE REFERENCE  
51810 1/06 Rev. 2  
 
Majestic® Fireplaces Power Venting System  
3. Vent System Termination  
Power Venter Specifications  
Before installing Power Venter, determine location of  
vent system termination.  
Electrical  
4. Location of the Fan  
Motor voltage ....................................115  
Control Circuit Voltage ........................24  
Hz........................................................60  
RPM................................................3000  
Watts...................................................95  
Amps................................................1.26  
Thermal Protection............................Yes  
To keep the noise level to a minimum, the fan should  
be located as far from the appliance as possible.  
A storage cupboard, or laundry area are preferred  
locations. Permanent access for inspection and  
servicing must be provided.  
5. All portions of the vent system under positive pres-  
sure during operation (on the outlet side of the  
Power Venter) shall be designed and installed so as  
to prevent leakage of flue or vent gases into a build-  
ing.  
Mechanical  
Shaded Pole Motor ...........................Yes  
Int. Fan Cooled ................................. yes  
Shaft Diameter (inch)........................313  
Bearings..............................Sleeve Type  
General Code Requirements  
The exit terminal shall be so arranged that flue gases  
are not directed so as to jeopardize the safety of  
people, overheat combustible structures or enter  
buildings, and that proper clearances are maintained.  
Always consult your local codes and authorities. In  
the absence of such codes follow the current installa-  
tion codes for gas burning appliances CSA-B149.1 in  
Canada or ANSI Z223.1/NFPA 54 in the US.  
Also see Diagram A - Vent Termination Locations.  
3
51810  
 
Majestic® Fireplaces Power Venting System  
General Venting Information - Termination Location  
INSIDE  
CORNER DETAIL  
G
V
H
A
D
E
V
B
C
B
V
B
 
�  
V
V
L
B
V
V
 
�  
G
�  
F
V
V
B
M
V
J
G
A
X
B
I
K
X
V
A
AREA WHERE TERMINAL IS NOT PERMITTED  
VENT TERMINATION  
AIR SUPPLY INLET  
X
V
CFM145a  
Canadian Installations1  
US Installations2  
A = Clearance above grade, veranda, porch,  
deck, or balcony  
12” (30cm)  
12” (30cm)  
B = Clearance to window or door that may be  
opened  
6” (15cm) for appliances  
6” (15cm) for appliances  
< 10,000 Btuh (3kW), 9”  
(23cm) for appliances > 10,000  
Btuh (3kW) and < 50,000 Btuh  
(15kW), 12” (30cm) for  
< 10,000Btuh (3kW), 12” (30cm)  
for appliances > 10,000 Btuh (3kW) and  
< 100,000 Btuh (30kW), 36” (91cm)  
for appliances > 100,000 Btuh (30kW)  
appliances > 50,000 Btuh (15kW)  
C = Clearance to permanently closed window  
12” (305mm) recommended to  
prevent window condensation  
12” (305mm) recommended to  
prevent window condensation  
D = Vertical clearance to ventilated soffit located  
above the terminal within a horizontal  
distance of 2’ (610mm) from the center  
line of the terminal  
18” (458mm)  
18” (458mm)  
E = Clearance to unventilated soffit  
F = Clearance to outside corner  
G = Clearance to inside corner (see next page)  
12” (305mm)  
see next page  
see next page  
12” (305mm)  
see next page  
see next page  
H = Clearance to each inside of center line  
extended above meter/regulator assembly  
3’ (91cm) within a height of 15’ (4.6 m)  
above the meter/regulator assembly  
3’ (91cm) within a height of 15’ (4.6m)  
above the meter/regulator assy  
I = Clearance to service regulator vent outlet  
3’ (91cm)  
3’ (91cm)  
J = Clearance to nonmechanical air supply inlet 6” (15cm) for appliances < 10,000  
to building or the combustion air inlet to any Btuh (3kW), 12” (30cm) for  
6” (15cm) for appliances  
< 10,000 Btuh (3kW), 9”  
other appliances  
appliances > 10,000 Btuh (3kW) and <  
100,000 Btuh (30kW), 36” (91cm)  
for appliances > 100,000 Btuh (30kW)  
(23cm) for appliances > 10,000  
Btuh (3kW) and < 50,000 Btuh  
(15kW), 12” (30cm) for  
appliances > 50,000 Btuh (15kW)  
K = Clearance to a mechanical air supply inlet  
6’ (1.83m)  
3’ (91cm) above if within 10’  
(3m) horizontally  
L = Clearance above paved sidewalk or paved 7’ (2.13m)†  
driveway located on public property  
7’ (2.13m)†  
M = Clearance under veranda, porch, deck or  
balcony  
12” (30cm)‡  
12” (30cm)‡  
1 In accordance with the current CSA-B149 Installation Codes  
2 In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Codes  
† A vent shall not terminate directly above a sidewalk or paved driveway which is located between two (2) single family dwellings and  
serves both dwellings  
‡ only permitted if veranda, porch, deck or balcony is fully open on a minimum two (2) sides beneath the floor:  
NOTE: 1. Local codes or regulations may require different clearances.  
2. The special venting system used on Direct Vent appliances are certified as part of the appliance, with clearances tested and ap  
proved by the listing agency.  
4
51810  
 
Majestic® Fireplaces Power Venting System  
Horizontal Discharge  
Vertical Discharge  
Installation  
1. Slip Sound Reducer into flue collar and press on to  
fireplace top.  
2. Fasten Sound Reducer to fireplace top with four (4)  
sheet metal screws supplied.  
3. Continue with the power venter installation as per  
instructions supplied with same.  
Oil Holes  
4” (102 mm) Insu-  
lated Flue Liner  
Motor Shaft  
Vertical  
Sound Reducer  
Sheet Metal  
Screws  
Fireplace Top  
Incorrect  
FP1419  
Fig. 3 The Power Venter must be mounted with motor shaft  
horizontal.  
3. Power Venter housing in single wall a 6” (152 mm)  
clearance must be maintained. (Fig. 4)  
Fireplace  
FP1417  
Combustible Material  
Fig. 1 Secure sound reducer to fireplace top with four (4)  
sheet metal screws.  
Installation Restrictions  
Sound Reducer Kit SR6  
Power Venter  
1. Although the Power Venter can be installed any-  
where in the exhaust system, it is best if it is installed  
as close to the termination of the vent system as  
possible to obtain optimal appliance efficiency and to  
prevent flue gas leakage. (Fig. 2)  
6" (152mm)  
Minimum  
NOTE: 6” (152mm)  
maximum clearance from  
combustible must be  
maintained.  
Vent Support Hangers  
Spaced 36” (914mm) on  
Horizontal Run  
FP1420  
Combustible Material  
Fig. 4 Minimum clearance.  
4. Allow for a minimum of 18” (457mm) vertical rise off  
the top of the appliance before the vent makes a 90°  
elbow to the horizontal. (Fig. 5)  
Anti-Vibration Sleeve  
5. Vent pipe transitions, where necessary, should be  
gradually tapered. (Fig. 6)  
FP1418  
6. Power Venter to vent pipe connections and all joints  
on the outlet side of the Power Venter must be  
sealed with high temperature silicone sealant or alu-  
minum vent pipe tape to prevent flue gas leakage.  
(Fig. 7)  
Fig. 2 It is best to install Power Venter as close to the termi-  
nation as possible.  
2. Power Venter must be mounted with motor shaft hor-  
izontal to ensure proper operation of the fan proving  
switch and to prevent motor bearing wear. (Fig. 3)  
7. The vent terminal must not be more than 20’ (6m)  
below the appliance’s flue outlet.  
5
51810  
 
Majestic® Fireplaces Power Venting System  
4. Install optional sound reducer (Model SR5 or SR4)  
onto fireplace. See Installation Instructions pack-  
aged with sound reducer.  
5. Mount Power Venter  
NOTE: It is best to locate the fan near the vent  
terminal. However, if such a location is not suitable,  
the fan can be installed anywhere within the vent  
system.  
18” (457mm)  
Minimum  
a. Remove vibration isolation mount and retain  
the nut from the parts bag and install. Install on  
Power Venter as shown in diagram. Next install  
flexible duct piece and outlet collar using four (4)  
screws to fasten.  
FP1421  
Fig. 5 An 18” (457mm) minimum vertical rise is necessary  
before a 90° elbow.  
b. To prevent vibration, securely support Power  
Venter from ceiling or joist with Power Venter  
bracket. (Fig. 8)  
c. By using 1” (25 mm) bracket, clearance to fan is  
maintained at 1” (25 mm). The addition of the 6”  
(152 mm) bracket, maintains a 6” (152 mm) clear-  
ance to combustibles.  
Incorrect  
Correct  
Vertical Mounting  
FP1423  
Fig. 6 Vent pipe transitions should be gradually tapered.  
Ceiling  
Power Venter  
Bracket  
Power Venter  
6” (152 mm)  
Bracket  
Negative Pressure  
Positive Pressure  
1” (25 mm)  
Bracket  
Vibration  
Isolation  
Mounts  
Discharge  
All seams on the  
positive side of  
power venter to  
be sealed with  
high temperature  
silicone sealant.  
Fan  
Power Venter  
Discharge  
FP1424  
Horizontal Mounting  
FP1422  
Fig. 7 Vent pipe connections and all joints on the outlet side  
of the power venter must be sealed with high temperature  
sealant.  
Wall or  
Wall  
Studs  
Installation  
1. Cut 6¹⁄₄” (159mm) diameter hole through outside wall  
- see General Code Requirements for proper loca-  
tion.  
2. Install vent terminal. Fasten from outside with four  
(4) screws and caulk around flange edge.  
Fan  
Power Venter Bracket  
3. Locate fireplace and fasten to floor as shown in fire-  
place manual.  
FP1425  
Fig. 8 Power venter mounting options.  
6
51810  
 
Majestic® Fireplaces Power Venting System  
6. Measure distance between fireplace’s flue outlet (top  
of Sound Reducer) and fan inlet. Cut flexible duct  
and insulate with insulation sleeve sections using  
noise cone for ease of mounting. Please note that  
wherever possible use continuous length pipe with-  
out joints.  
Electrical Wiring  
Electrical connections and grounding must be in ac-  
cordance with the Canadian Electrical Code, C22.1 Part  
1 and in U.S.A., National Electrical Code ANSI/NFPA70  
and/or local codes where applicable.  
7. Apply silicone at both ends, and attach flex pipe to  
collars. Secure with clamps (provided). For addition-  
al reinforcement, it is recommended that three (3)  
sheet metal screws be used at each joint to prevent  
pipe from accidentally separating.  
Operation Sequence of 24 VAC  
Controlled Appliance  
When Power Vent Switch is activated, its closure  
completes the 24 VAC electrical circuit from the ap-  
pliance transformer through the switch to the Power  
Venter relay. The 24 volts applied to the relay coil bring  
in the 115 volt power to the motor. The air movement  
generated by the Power Venter closes the Fan Proving  
Switch contacts which allows the switch signal to reach  
the 24 volt burner control. The Fan Proving Switch  
actually becomes the burner controller and will allow  
the appliance to operate only when the Power Venter is  
operating.  
8. If fan is located at vent terminal, connect it by first  
sealing the joints with silicone. Again use three (3)  
sheet metal screws for each joint.  
9. Seal all joints with aluminum vent pipe tape and  
cover with insulation. Joints between fan and vent  
terminal must be absolutely air and water tight to  
prevent flue gas or condensation leakage.  
10. Support venting duct with plumber’s strap (supplied  
by installer). On horizontal runs support vent pipe  
every 36” (914mm) to prevent it from sagging.  
WARNING: All 120 volt wiring must com-  
ply with applicable codes and ordinances.  
The optional power venter Model PVS-1 is  
equipped with a plug-in cord and an elec-  
tric knockout. When unit is wired directly  
the cord must be removed.  
11. Enclose venting system, if necessary leaving at  
least 1” (25 mm) clearance between insulation and  
combustible materials and 6” (152 mm) between fan  
housing and combustibles.  
Install 24 Volt wiring harness. Simply plug in connector  
at fan electrical box, slide connectors onto gas valve  
operator and connect to power switch or if applicable to  
thermostat. Refer to Figure 9. Be sure to keep wires  
away from heated areas, within the fireplace route wires  
along gas line.  
Black  
To Fan*  
White  
L2  
L1  
115 / 1 / 60  
Power  
Venter  
Motor  
White  
N/O Relay  
Black  
Black  
G
115V  
*If optional fan and/or power  
venter is used, wire electrical  
system as shown in diagram.  
(Dotted Line) Wiring connec-  
tions must be made within  
junction box of power venter  
and optional fan.  
Transformer 20 VA  
24V  
Fan  
Prover  
Gas Valve  
Thermostat  
Blue  
Yellow  
Relay Coil  
Orange  
Blue  
FP1426  
Fig. 9 Typical wiring, 24 VAC control.  
7
51810  
 
Majestic® Fireplaces Power Venting System  
b. Set Air-Flow Adjustment by loosening locknut and  
turning rod handle. CAUTION: HANDLE MAY  
BE HOT, use pliers to move handle. Position of  
rod handle on outside of Power Venter housing  
indicates position of Air-Flow Adjustment inside  
housing.  
Operation and Checking the Draft  
1. Insofar as is practical, close all doors, windows and  
air inlets to the building. Turn on all exhaust fans  
(range hood, bathroom exhaust, etc.) so they will  
operate at maximum speed.  
2. Place appliance into operation. See fireplace  
manual for gas start up information. Once pilot has  
been lit and gas valve has been set open, activate  
power switch, or where applicable, adjust thermostat  
so the appliance will operate continuously. At this  
point the fan will start up and once air flow has been  
proven the main burner will start.  
c. Using pliers, move handle towards minimum draft  
setting until spillage is detected at relief opening,  
then re-open Adjustment just enough to eliminate  
spillage.  
d. Lock Adjustment at desired setting by tightening  
locknut.  
e. Return doors, windows exhaust fans and fire-  
place dampers to their previous condition of use.  
3. After allowing appliance to operate for five (5) min-  
utes, test for spillage at the draft hood relief opening  
or at fireplace front opening.  
f. Turn off appliances started in Step 4 above.  
Checking the Draft. Allow the vent connected gas  
utilization equipment to operate for several minutes.  
Then check to see that the combustion products  
are going up the chimney or gas vent properly, by  
passing a lighted match or taper around the edge  
of the relief opening of the draft hood. If the chim-  
ney or gas vent is drawing properly, the smoke  
from the match flame will be drawn into the draft  
hood or opening. If smoke is not drawn in, then the  
combustion products are escaping from the relief  
opening into the room. Under these conditions, the  
equipment must not be operated until proper adjust-  
ments or repairs are made to provide adequate draft  
through the chimney or gas vent.  
Damper Closed  
Damper Open  
FP1427  
Fig. 10 Adjustable damper control.  
Maintenance  
The Power Venters must be inspected semi-annually.  
Points of inspection are:  
4. Next, turn on all other fuel-burning appliances within  
the same room so they will operate at their full input.  
Repeat Step C above, checking the draft on each  
appliance.  
1. Motor - Motor must rotate freely. Oil every six  
months of operation with four (4) drops of SAE 20  
oil.  
5. The Air-Flow Adjustment on the Power Venter is fac-  
tory set for maximum air flow. Operating a properly  
sized Power Venter at maximum setting will assure  
that combustion gases are safely removed to the  
outside. If the Power Venter has excess venting  
capacity than what is required for this application,  
operating the Power Venter with the Air-Flow Adjust-  
ment at the maximum setting may draw more dilu-  
tion air than necessary.  
2. Wheel - Wheel must be clean of soot, ash or any  
other coating which inhibits rotation or air flow. Re-  
move all foreign material from vent system before  
operation.  
3. Pressure Switch - Pressure Switch must operate  
freely. Verify proper operation by observing Opera-  
tion Sequence at least every six months.  
The Air-Flow Adjustment may be set by use of a  
combustion analyzer, inclined manometer or draft  
gauge. Alternatively, the Air-Flow adjustment can be  
set using a smoke candle or taper, as follows:  
a. With exhaust fans operating, air inlets closed and  
all appliances firing (as instructed above), hold  
lighted match or taper around the edge of the re-  
lief opening of the draft hood or fireplace opening.  
8
51810  
 
Majestic® Fireplaces Power Venting System  
Pressure Switch  
Power Venter  
Motor Leads  
Heyco  
Heyco  
Adapter  
Bushing  
Green #4  
Adapter  
Bushing  
White  
Black  
N/O Blue  
Comm  
Gas Valve  
Blue #3  
Red #2  
Grn  
Switch On  
Off  
White #1  
Green/Yellow  
Stripe  
Motor  
1/2"  
Timer/Relay  
Control  
White/Red  
Stripe  
24  
VAC  
Black  
Black  
20VA Transformer  
Yellow  
5
4
White  
Vibration Isolation  
Field Installed  
115  
VAC  
Optional  
location for  
vibration isolator  
Yellow  
Power Venter  
Housing  
Power Venter  
Junction Box  
CFM Corporation reserves the right to make changes in design, materials, specifications, prices and discontinue colors and products at any time,  
without notice.  
Power Venter Part List  
Mounting Bracket 1”  
Mounting Bracket 6”  
Hose Clamp  
50543  
49552  
51875  
Motor Assembly, Power Vent  
Switch, Wall  
51867  
51842  
Vibration Insulator  
Plate Wall Switch  
50545  
51843  
Pressure Switch  
52921  
Timer Relay/Post Purge  
Transformer 24 Volt  
Sound Reducer (SR6)  
52901  
10001694  
49770 (Fig. 1)  
9
51810  
 
Majestic® Fireplaces Power Venting System  
10  
51810  
 
Majestic® Fireplaces Power Venting System  
11  
51810  
 
CFM Corporation  
2695 Meadowvale Blvd. • Mississauga, Ontario, Canada L5N 8A3  
 

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