Mestek M) G 025, Инструкция по установке и эксплуатации, Страница: 17 / 47

Form 43471040
-16- Oct 2013
12.0) INSTRUCTIONS FOR PRESSURE TEST GAUGE CONNECTION
SUPPLY PRESSURE SUPPLY PRESSURE SUPPLY PRESSURE SUPPLY PRESSURE
1.
The installer will provide a 1/8” N.P.T. tapped plug, accessible for test gauge connection immediately
upstream of the gas supply connection to the heater.
MANIFOLD PRESSURE MANIFOLD PRESSURE MANIFOLD PRESSURE MANIFOLD PRESSURE – – – – COMBINATION GAS VALVE IS FACTORY SET COMBINATION GAS VALVE IS FACTORY SET COMBINATION GAS VALVE IS FACTORY SET COMBINATION GAS VALVE IS FACTORY SET
1. Turn the gas valve to the “OFF” position. Remove the 1/8” plug from the combination gas valve at the Outlet Outlet Outlet Outlet
Pressure T Pressure T Pressure T Pressure Tap ap ap ap shown below and connect a 1/8” nipple to the tapped hole. Connect the test gauge to the
nipple. Turn on the gas supply.
1-STAGE CONTROLS
Pressure Regulator Adjustment
(under cap screw)
1/8” NPT
Inlet Pressure
Tap with 3/16” Hex
Allen Wrench Plug
1/8”NPT
Outlet Pressure
Tap with 3/16” Hex
Allen Wrench Plug
Gas Control
Knob
Wiring
Terminals (2)
Ground
Terminals (2)
OUTLET
INLET
CAUTION
Never jumper these terminals. This
shorts out valve coil and may burn
out heat anticipator in thermostat.
STEP-OPENING
GAS CONTROL VALVE
ON
OFF
MV
MV
2-STAGE CONTROLS
HI-LO
Adjustment Screws
(use 3/32” Hex
Allen Wrench)
1/8” NPT
Inlet Pressure
Tap with 3/16” Hex
Allen Wrench Plug 1/8”NPT
Outlet Pressure
Tap with 3/16” Hex
Allen Wrench Plug
Gas Control
Knob
Wiring
Terminals (3)
Ground
Terminals (2)
OUTLET
INLET
CAUTION
Never jumper these terminals. This
shorts out valve coil and may burn
out heat anticipator in thermostat.
TWO-STAGE
GAS CONTROL VALVE
HI
LO
ON
OFF
LO
C
HI
Electric
Solenoid
Coil
Regulator
Vent Cover