Table of Contents
Advertisement
A sealed regulator is supplied with the heater, which maintains the proper manifold pressure when the main burner is operating
under the following pressure:
NATURAL GAS
PROPANE GAS
2.5 ELECTRICAL REQUIREMENTS
All electrical installations must meet local and the latest edition Electrical Code PART 1 CSA C22.1 in Canada and ANSI/
NFPA N0 70 in the U.S.A. The heater must be electrically grounded in accordance with the local electrical code.
Single heater requires 24 Volt, 60 Hz electrical transformer sized at 40VA.
Multiple heaters connected to a single 24 Volt, 60 Hz transformer, require 40 VA for the first heater and 30Va for all subse-
quent additions. For example, four heaters wired together in parallel, equals a 130Va load, (40Va + 30Va + 30Va + 30Va), the
closest rated transformer HIGHER than the 130Va total rating is 150Va so a 150 Va Transformer is the correct selection.
Five heaters wired together in parallel equal a 160Va load (40Va + 30Va +30Va +30Va + 30VA).
In this case the next size transformer with a HIGHER Va rating than 160Va must be selected, and a 200Va Transformer is the
correct selection.
Note:
Total load of all heaters must be considered in determining the required contact rating of the controller, particularly when
grouping the heaters in a zone. It is not recommended to install more than 12 heaters per zone and proper wiring polarity MUST
BE maintained throughout.
Low Voltage Wiring:
Total low voltage wiring distances must be allowed for, with low voltage wiring correctly sized by an approved electrician to
conform with the total transformer Va rating. Proper electrical rating in the system can be checked by voltage readings at igni-
tion module terminals with ALL heaters ON under full load. To avoid system malfunction, the voltage range must be within
21.6 Volts to 26.4 Volts.
Malfunction of the heating system will result if the voltage varies by more than -10% or +10% (21.6v to 26.4v) or if the polarity
happens to be reversed
3. INSTALLATION PROCEDURES
a) Properly install gas line as outlined in Section 2.3., Page 5.
b)
Mount heaters by using non-combustible mounting hardware as illustrated in Diagram 2 on Page 7.
Observe the minimum clearances as outlined in Sections 8.3 to 8.4. on page 8, and suggested mounting
distances in section 8.5 on page 9.
C)
Connect heater to the main gas line. A 1/2" flexible connector available as an option from Schwank Inc. must be used to
absorb gas line expansion and any vibration.
d)
Check gas line for leakage by using soap test or gas meter test. Ensure gas pressure meets the requirements outlined in
Section 2.4, Page 5.
WARNING:
When testing the main gas line pressure, ensure that the isolation valve and combination gas valve are
"OFF", otherwise damage to the combination gas valve will result.
LINE PRESSURE IWC
MINIMUM
MAXIMUM
6.0
14.0
11.0
14.0
Natural gas models are orificed for 1000 BTU/CU.FT.
Propane gas models are orificed for 2500 BTU/CU.FT.
MANIFOLD PRESSURE IWC
AT TAP IN GAS VALVE
5.0
10.0
Page 6
SP-M110-CX-05B
1100 Manual
R.D.: March 2006
R.L.: 5B
KH
Advertisement
Table of Contents
