13. Observe heater operation for at least one complete cycle to check for safe and proper operation. Depress and
hold safety door switch.
Converting Unit from Natural Gas to Propane
The heater is shipped factory-equipped for use with natural gas. A propane conversion kit is provided with each
heater. Ensure that components in the kit are available (refer to Table 26) and install the kit as follows:
1. Install propane regulator spring kit in gas valve in accordance with valve manufacturer’s instructions included with kit.
2. Attach propane disk near gas valve.
3. Carefully remove natural gas orifice (see Figure 25) from heater and install propane orifice.
4. Install labels:
a. Use permanent marker to fill in appropriate information on conversion label from kit.
b. Select location for label near rating plate.
c. Ensure that surface is clean and dry and affix conversion label and regulated propane label from kit.
5. During heater startup, check valve outlet pressure in accordance with Measure and Adjust Manifold (Outlet)
Gas Pressure section.
ADJUSTMENTS—CONTINUED
Measure and Adjust Manifold (Outlet) Gas Pressure—Continued
Measure and Adjust Manifold Gas Pressure—Elevation >2,000 Feet (>610 Meters)—Continued
46
I-UEZ (04-21) 1034347-0
Table 25. Inputs and Capacities by Elevation in Canada
Elevation
(Feet (Meters))
Unit Size
130 180 260 310
Normal
Input
Thermal
Output
Capacity
Normal
Input
Thermal
Output
Capacity
Normal
Input
Thermal
Output
Capacity
Normal
Input
Thermal
Output
Capacity
BTUh
0–2000
(0–610)
131,000 121,830 175,000 159,250 260,000 239,200 305,000 277,550
2001–4500
(611–1373)
117,900 109,647 157,500 143,325 234,000 215,280 274,500 249,795
Table 26. Propane Conversion Kit Components
Component Description
Unit Size
130 180 260 310
PN
Conversion kit Package PN 261647 1036196R 1036197R 221445
Regulator spring kit
Honeywell #396221 260605 —
Honeywell #393691 — 98720
Single-stage gas controls With standard or slow-opening pressure regulator
VR82XXS* VR82XXT* VR82XXK* VR82XXM*
VR83XXS* VR83XXT* VR83XXK* VR83XXM*
Burner orifice
3.3 mm 120145 —
#24 — 196899 —
4.6 mm — 1034352 —
#8 — 196903
Label
Conversion 64391
Regulated propane 79718
Gas disk Propane 37752
*XX = variable numeric charactors.
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