Schwank P40U Fenwal - Manual (Page 24)

24
P40U-F / P40U-IF I&O Manual
IM101220
RD: MAY 2014
RL: 5A
13. ELECTRICAL AND THERMOSTAT WIRING (WIRING DIAGRAMS PAGE 26 & 27)
The heater must be electrically grounded in accordance with the
National Electrical Code. ANSI / NFPA 70 or current Canadian
Electrical code CSA C22.1. Maximum power flow for internal 24V burner components is 21VA.
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 control-
ling thermostat or switch. Each tube heater requires 120V, 60 HZ electrical power sized for
145VA. Maximum power flow for internal 24V burner components is 21VA.
The ignition control includes a 24V/120V relay switch that provides a 45 second post-purge of
the system. A 24V Thermostat, TruTemp Thermostat, or 24V controller signal must be
used for the post-purge feature to function. A line voltage Thermostat or an “ON/OFF”
switch will disable the post-purge feature.
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.
14. HIGH ALTITUDE INSTALLATIONS - also refer to chart in Section 28
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 28. 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 33.
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 28.
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 28.
15. 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.
16. RECOMMENDED MAINTENANCE
Improper adjustment, alteration, service or maintenance can cause property damage, injury or
death. This heater must be installed and serviced only by a trained gas service techni-
cian.
1. Inspect the entire heater system, venting, and gas supply connections at least
annually prior to the heating season. Replace worn parts and repair deficiencies.
2. Check the inlet air opening and the blower periodically, cleaning off any lint or foreign mat-
ter. It is important that the flow of combustion and ventilation air must not be obstructed.
3. Lubricate Blower motor, by adding several drops of oil to oil ports located on the left hand
side of the motor.
THE TUBE HEATER BURNER IS COMPLETELY FACTORY ASSEMBLED AND TESTED. ANY ALTERATION
VOIDS THE CSA CERTIFICATION AND MANUFACTURER’S WARRANTY. FOR ADDITIONAL INFORMATION,
CONTACT YOUR LOCAL DISTRIBUTOR OR THE MANUFACTURER.
NOTICE