Honeywell HM509 Owners Guide - Page 17

TrueSTEAM Humidification System Wiring 12 Wire the TrueSTEAM according to the diagram that applies to your humidity control. Follow this diagram if using a mechanical humidistat Follow this diagram to wire TrueIAQ for manual such as H8908ASPST or other. operation. HVAC R CWY G HUM HUM MECHANICAL HUMIDISTAT RECOMMENDED AIR FLOW SWITCH (AFS) R Rc W Y G Factory installed jumper 24V 24V HUM HUM C GT R RT GF EXT HVAC POWER MASTER TrueSTEAM - INTERNAL M24756 THERMOSTAT If AFS is used, ensure DIP 5 is in ON position. A Set TrueIAQ ISU parameter 10 to 1, and ISU 25 to 2. B For auto-operation: also wire W and G to thermostat W and G. TrueIAQ HVAC B R CWY G HUM HUM R C RECOMMENDED AIR FLOW SWITCH (AFS) A 24V 24V HVAC POWER HUM MASTER HUM C GT R RT GF EXT R Rc W Y G Factory installed jumper TrueSTEAM - INTERNAL THERMOSTAT M27409 If AFS is used, ensure DIP 5 is in ON position. Follow this diagram if using VisionPRO IAQTM for independent fan control. TrueSTEAM will independently activate furnace fan (humidity on demand). EQUIPMENT INTERFACE MODULE (EIM) A Set VisionPRO IAQTM ISU D-1 R-2 parameter 374 to 3. C-3 B If operating TrueSTEAM without monitoring HVAC power or AFS, C wiring hookup is optional, but ensure DIP 4 is in ON position. If AFS is used, ensure DIP 5 is in ON position. VISIONPRO IAQ A RECOMMENDED AIR FLOW SWITCH (AFS) TrueSTEAM - INTERNAL 24V 24V HUM HUM CB GT R RT GF EXT 15 1 CONV. HP 2 W1 O/B 3 W2 AUX C W3 AUX2 R Y Y RC Y2 Y2 RH G G H1 U M2 D1 H M2 V1 N T2 FAN FURNACE BOARD C HEAT 1 RELAY HEAT 2 RELAY HEAT 3 RELAY COOL 1 RELAY COOL 2 RELAY G FAN RELAY M24758 69-2036EFS-07