National Comfort Products Comfort Pack U Series, Руководство по установке

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Installation Guide | Comfort Pack with 80% Gas Heat
ALL COMPONENTS OF A GAS SUPPLY
SYSTEM MUST BE LEAK TESTED PRIOR TO
PLACING EQUIPMENT IN SERVICE. NEVER
TEST FOR LEAKS WITH AN OPEN FLAME.
FAILURE TO COMPLY COULD RESULT IN
PERSONAL INJURY, PROPERTY DAMAGE
OR DEATH.
!
WARNING
Gas Connection and View
Figure 2
Access Panels and Heat Exchanger Inspection Panel
Duct Work
(supplied by others)
Upper Cabinet
Houses the Heat Exchanger
Cooling Section
(lower cabinet)
Gas Shut Off
(supplied by others)
Drip Leg
(supplied by others)
Ground Union
(supplied by others)
Gas Valve
Burner/Control Compartment
w/ Access Panel Removed
Burner Assembly
*Install the heat exchanger inspection panel in the ductwork in
such a manner that will prevent air leaks.
**1/8" NPT plugged tapping for test gauge not permitted in the
Massachusetts.
Valve Outlet Gas Pressure Setting
Measuring valve outlet gas pressure cannot be done until the
heater is in operation. Normally adjustments should not be
necessary to the factory preset regulator (also, see paragraph on
high altitude operation). If adjustment is necessary, the following
warnings and instructions apply.
VALVE OUTLET GAS PRESSURE MUST
NEVER EXCEED 3.5” W.C. FOR NATURAL
GAS AND 10” W.C. FOR PROPANE GAS.
!
WARNING
For Natural Gas: When the heater leaves the factory, the
combination gas valve is set so that the valve outlet gas pressure
is regulated to 3.5" w.c. Inlet supply pressure to the valve for
natural gas must be a minimum of 5" w.c. and a maximum of 14"
w.c. Normally, field adjustment should not be required.
For Propane Gas: When the heater leaves the factory, the
combination gas valve is set so that the valve outlet gas pressure
is regulated to 10" w.c. Inlet supply pressure to the valve for
propane gas must be a minimum of 11" w.c. and a maximum of
14" w.c. Normally, field adjustment should not be required.
Before attempting to measure or adjust valve outlet gas pressure,
the inlet supply pressure must be within the specified range both
when the heater is in operation and on standby.
Incorrect inlet pressure could cause excessive valve outlet gas
pressure immediately or at some future time. If natural gas
supply pressure is too high, install a regulator in the supply line
before it reaches the heater. If natural gas supply pressure is too
low, contract your gas supplier.
Instructions on How to Check Valve Outlet
Pressure
(Can only be done after heater is installed):
1. With the manual valve positioned to prevent flow to the main
burner, connect a manometer to the 1/8" pipe outlet pressure
tap in the valve. NOTE: A manometer (fluid-field gauge) is
recommended rather than a spring type gauge due to the
difficulty of maintaining calibration of a spring type gauge.
2. Open the valve and operate the heater. Measure the gas pressure
at the outlet of the automatic gas valve. Normally adjustments
should not be necessary to the factory-preset regulator. If
adjustment is necessary, set pressure to correct settings