22
Control System
Dip Switch
OFF
ON
1-3
N/A
N/A
4
Inlet Limit
Operating
Not Operating
5
Gas Type
LP
NG
6
Max.
Normal
Max.
7
Min.
Normal
Min.
Maximum flame detecting voltage
2.4 V
Pre-purge time
Maximum 10s, minimum 1s
Safety Time (igniting time)
3.5s
Igniting interval time
<10s
Post-purge time
180s
Over-heating 1,2,3 protection detection time
<1s
Temperature sensor fault detection time
<2s
Nr. of trial for ignition
10
DHW water SET temperature range
DHW water OFF temperature
DHW target tempe DHW differentials
temperature (15ºC)
DHW water ON temperature
Below DHW target tempe3ºC
DHW water ON minimum water flow
0.5 GPM
DHW water OFF minimum water flow
0.4 GPM
• System Control Specifications
Marquis Manual_61515_Water Heater 7/1/15 1:58 PM Page 25
Summary of Contents for Marquis TWH180
Page 26: ...23 Control System Marquis Manual_61515_Water Heater 7 1 15 1 58 PM Page 26 ...
Page 27: ...24 Control System Ladder Diagram Marquis Manual_61515_Water Heater 7 1 15 1 58 PM Page 27 ...
Page 34: ...31 Repair Parts Diagram Marquis Manual_61515_Water Heater 7 1 15 1 58 PM Page 34 ...
Page 36: ...33 Repair Parts Diagram Marquis Manual_61515_Water Heater 7 1 15 1 58 PM Page 36 ...
Page 37: ...34 Repair Parts Diagram 4 Marquis Manual_61515_Water Heater 7 1 15 1 58 PM Page 37 ...