Install Instructions

APPENDICES
OPTION 13: Prestige IAQ controlling 2 TrueSTEAM humidiers
AFS
6
543
2
ON
OFF
1
AFS MONITOR RECOMMENDED
M33058A
Tr ueSTEAM 1
FURNACE
Tr ueSTEAM 2
A DOUBLE-POLE RELAY SUCH AS THE R8228D1018 IS REQUIRED.
AN AIR-FLOW SWITCH IS RECOMMENDED. IF AN AIR FLOW SWITCH IS NOT USED THERE
DOES NOT NEED TO BE A WIRE ATTACHED TO C ON THE TrueSTEAM AND THE #4 DIP
SWITCH NEEDS TO BE SET TO “ON”.
GT IS NOT REQUIRED FOR THIS APPLICATION. SINCE THE PRESTIGE IAQ THERMOSTAT
DOES NOT HAVE A Y/G INTERCONNECT, PARALLEL WIRING CAN BE DONE (AS SHOWN).
HM506, HM509, OR HM512 TrueSTEAM HUMIDIFIERS CAN BE USED.
THE U1, U2, OR U3 CONTACTS CAN BE CONFIGURED TO CONTROL A HUMIDIFIER. IN THIS
DIAGRAM THE 1 TERMINALS ARE USED.
CONFIGURE THE THERMOSTAT TO HUMIDIFY INDEPENDENT OF FAN (INSTALLER SETUP
374 SET TO 3).
1
2
3
4
5
6
6
5
1
2
5
3
3
4
IAQ
DEVICE
THM5421R1005
SENSOR TYPE
TrueSTEAM Humidication System 69-2285—05
65
B: Advanced TrueSTEAM Wiring