Installation and Service Manual

2
1. Read these instructions carefully. Failure to follow
instructions can damage product or cause a hazardous
condition.
2. This conversion kit must be installed by a qualified service
person.
3. This conversion kit is for converting the HD/HDS 30, 45, 60
and 75 models from natural gas to propane gas at
0 – 2,000' elevations.
4. This kit contains the following:
• Five (5) #56 propane gas orifices
• A conversion rating plate
• A combination gas control (gas valve)
conversion kit containing:
– a cap screw
– an adjustment screw
– spring
– label
5. Prior to servicing, set the thermostat to the lowest setting.
Shut off the gas supply to the unit. Disconnect the electrical
power to the unit.
Conversion of any kit is the responsibility of,
and the risk of the person making the conversion.
CAuTIoN
Gas supply shall be shut-off prior to disconnecting the
electrical power, before proceeding with the conversion.
Failure to do so could result in fire, explosion or electrical
shock.
HD - Low Profile Power Exhausted
HDS - Low Profile Separated Combustion
MBH Input
30 - 30,000 Btu/hr input
45 - 45,000 Btu/hr input
60 - 60,000 Btu/hr input
75 - 75,000 Btu/hr input
Heat Exchanger Type
A - Aluminized
H - Hot surface ignition
Control Code Type
34 - 115V/25V hot surface ignition, 100% shut-off with
lockout - natural gas.
74 - 115V/25V hot surface ignition, 100% shut-off with
lockout - propane gas.
Power Code
01 - 115 volt, 60 hertz, single phase
H D 4 5 A H 0 1 3 4
Figure 2.2
Serial- Number Designations
01 01 101 01 97 1000
Motor Vendor Code
01- Century
05- Universal
etc.
Year of Manufacture
97- 1997
98-
1998
etc.
Week of Manufacture
01- 1st week of year
26-
26th week of year.
Sequence
Number
Fan Vendor Code
01- Revcor
08- Brookside
etc.
Series Identity Number
Identifies which series of controls
were furnished on the unit.
Figure 2.1
Model Number Designations
Installation of Kit