Gas Installation - HeatStar HSU100NGPALP Operating Instructions And Owner's Manual

Horizontal Vent System - Vent Pipe Only
Horizontal Vent System - Vent Pipe and Air Inlet Pipe

GAS INSTALLATION

WARNING: Do not apply more than ½ psi (3.48 kPa) of gas
pressure to the heater. Pressures in excess of ½ psi (3.48 kPa)
will damage the heater and could result in injury or death.
Never use a match or open flame to check for gas leaks. This
could result in an explosion or fire, resulting in injury or
death.
1. Installation of gas piping must conform with local/national codes.
2. In The Commonwealth of Massachusetts this heater must be
installed by a licensed plumber or gas fitter and must have a "T
handle" type gas valve.
3. The gas pipe must have the proper capacity to deliver the correct
amount of gas at the proper pressure to the heater. The maxi-
mum capacity of gas pipe is defined by local codes or NFPA 54 or
CSA B149.1. The capacity is based on:
a. The diameter of the gas pipe.
b. The length of the gas pipe.
c. Type of gas used (natural gas or propane).
d. The operating pressure of the gas.
e. The input rate, or gas flow rate of the heater.
4. With the above information and the gas flow for each heater in
Table 7, determine the proper size of gas pipe required.
5.
6.
7.
Sediment Trap/Manual Shut-Off Valve Installation
FIGURE 8
FIGURE 9
Model
Size
100
200
250
300
400
* Manifold Pressure: NG=3.5" W.C. (0.87 kPA) & LP=10"W.C.
(2.49 kPA).
** CFH based upon NG's heating value=1050 Btu/ft3 (39.1 Mj/m3) &
LP's heating value=2,500 Btu/ft3 (93.1 MJ/m3).
8.
9.
10
Compact Unit Heater
The minimum inlet gas pressure is:
a. Natural gas = 6.0" Water column (1.49 kPa)
b. Propane = 1 1.0" W.C. (2.74 kPa)
The maximum gas pressure to the appliance is ½ PSI (14" W.C. or
3.48 kPa).
Install a union and a manual shut-off valve adjacent to the unit
for emergency shut-off and easy servicing of controls, including a
1/8" NPT plugged tapping accessible for test gauge connection.
See Figure 10.
TABLE 7
Gas Consumption & Orifice Information*
Gas CFH**
Type (m3/Hr)
NG 95.2 (2.7)
LP 40 (1.1)
NG 119 (3.7)
125
LP 50.0 (1.4) 1.36 (5.1)
NG 142.9 (4.0)
150
LP 60.0 (1.7)
NG 190.5 (5.4)
LP 80.0 (2.2)
NG 238.1 (6.7)
LP 100 (2.8)
NG 285.7 (8.1)
LP 120 (3.4)
NG 381.0 (10.8)
LP 160 (4.5)
When attaching the gas pipe to the gas valve on the heater, care-
fully use a 2nd wrench so the gas valve does not rotate and cause
damage to the valve or heater.
Provide a sediment trap as close to the appliance as possible.
See Figure 10.
Operating Instructions and Owner's Manual
FIGURE 10
Gal/Hr Orifice # of
(L/Hr) Size Orifices
- #42
4
1.09 (4.1) #53
- #42
5
#53
- #42
6
1.6 (6.2) #53
- #38
7
2.2 (8.3) #52
- #37
8
2.7 (10.3) 1.65mm
- #36
9
3.3 (12.4) #51
- #36
12
4.4 (16.5) #51