Form #43219020
June 08
6
7)
INSTRUCTIONS FOR PRESSURE TEST GAUGE CONNECTION
Supply Pressure
1.
The installer will provide a 1/8” N.P.T. plugged tapping, accessible for test gauge connection immediately upstream of the
gas supply connection to the heater.
Manifold Pressure:
1
Turn the gas valve to the “OFF” position. Remove the 1/8” plug from the combination gas valve at the outlet pressure tap
and connect the 1/8” nipple to the tapped hole. Connect gauge to nipple. Turn on the gas supply.
2.
With the main burner operating, check the burner manifold pressure using a water manometer. The combination gas
valve is factory set and should not be adjusted. If adjustment is required, remove the cover screw. Using a small
screwdriver, turn the adjustment screw clockwise
to increase, or counter-clockwise
to decrease the gas pressure to
burner. Replace the cover screw.
3.
Gauges that measure in pounds per square inch are not accurate enough to measure or set the manifold pressure. Use a
water manometer or a gauge calibrated in inches of water column. All measurements
MUST BE
made when this heater
and all other gas burning equipment that is connected to the gas supply system are operating at maximum capacity.
GAS PRESSURE TABLE
SUPPLY PRESSURE
HEATER MODEL
GAS
TYPE
MANIFOLD
PRESSURE
Minimum
Maximum
SG (3, 4, 6, 8, 10, 12, 14, 15)
Natural
6” W.C.
7” W.C.
14” W.C.
SG (3, 6, 10, 13)
Propane
10” W.C.
11” W.C.
14” W.C.
Minimum permissible gas supply pressure for purpose of input adjustment.
8)
ELECTRICAL CONNECTIONS
1.
All electric wiring shall conform to the latest edition of the National Electrical code (ANSI/NFPA No. 70), or the code
legally authorized in the locality where the installation is made.
2.
The unit must be electrically grounded in accordance with the National Electrical code (ANSI/NFPA No. 70-latest edition).
In Canada, refer to current standard C22.1 Canadian Electrical Code Part 1.
3.
The wiring providing power to the heater shall be connected to a permanently live electrical circuit, one that is not
controlled by a light switch.
4.
The power supply to the unit should be protected with a fused disconnect switch or circuit breaker. A service switch, as
required by local codes, shall be located in the vicinity of the heater (check local codes for allowable distances) and should
be identified as Heater Service Switch. All electrical wiring must be located in accordance with the required Clearances to
Combustibles below the heater as listed on the nameplate on the heater.
5.
When connecting the supply circuit to the heater, wiring material having a minimum size of 14 AWG and a temperature
rating of at least 90
˚
C shall be used.
