27
P40-R I&O Manual
IM120801
RD: AUG 2013
RL: 1D
14. GAS CONVERSION
WARNING: Gas conversion must only be performed by a trained gas ser-
vice technician.
Do not convert heater to alternate gas without using the proper kit listed
below. Property damage, injury or death could result.
Standard production of this model heater is for use with natural gas. Field conversion be-
tween Natural Gas and Propane Gas can be accomplished using field conversion kits avail-
able from you local Schwank or InfraSave supplier:
Part number: JS-0555-XB - Natural Gas to Propane Gas Conversion Kit P40-R
Part number: JS-0555-XA - Propane Gas to Natural Gas Conversion Kit P40-R
15. ELECTRICAL AND THERMOSTAT WIRING
(WIRING DIAGRAMS PAGE 29 & 30)
The heater must be electrically grounded in accordance with the
National Electrical Code. ANSI / NFPA 70 or current Canadian
Electrical code CSA C22.1.
Appliance and control wiring must be in accordance with all applicable local codes. The total
load of all heaters must be considered in determining the required contact rating of the con-
trolling thermostat or switch. Each tube heater requires 120V, 60 HZ electrical power sized for
145VA. The heater includes a 24V/120V relay switch and can be controlled by a 24V Thermo-
stat, a TruTemp Thermostat, a line voltage Thermostat or by an “ON/OFF” switch. Maximum
power flow for internal 24V burner components is 21VA.
A maximum night set-back of 9°F (5°C) is recommended for optimum economy and comfort.
To maintain satisfactory comfort levels do not turn off the heating system over night/weekends.
16. HIGH ALTITUDE INSTALLATIONS - also refer to chart in Section 26
When installed above the altitude stipulated below for the USA or Canada, the input must be
de-rated by 4% for each 1000 ft above the altitude listed .
If your local utility supplies gas
with a de-rated heat content, no orifice change is required in the heater
. If the gas supply
is not de-rated, the orifice must be changed according to the chart in Section 26. Check with
your local utility regarding the gas supply and the de-rating of this appliance. Maintain gas sup-
ply pressures indicated in Table 4, page 25.
USA:
The factory installed orifice for this appliance is approved for altitudes zero to 2000
feet above sea level. When installed above 2000 feet,
refer to Section 26
.
Canada
: The factory installed orifice for this appliance is approved for altitudes zero to
4500 feet above sea level. When installed above 4500 feet,
refer to Section 26
.
17. LIGHTING
INSTRUCTIONS
Refer to the lighting instructions label on the outside of the burner housing. If the unit locks out
on safety, main power to the unit must be manually interrupted for a 30 second reset period
before the heater can be restarted.
NOTE: On initial installation, the unit may lock out on safety owing to the length of time
required to bleed air from the gas piping system.
NOTICE
