Volt-Free Contact On/Off/Cooling/Heating Without Multiplexing; Volt-Free Contact On/Off/Cooling/Heating With Multiplexing; Demand Limit Or Setpoint Volt-Free Contact For Single-Circuit Units; Demand Limit Volt-Free Contact For Dual-Circuit Units - Carrier AQUASNAP 30RA/RH Operation & Maintenance Instructions Manual

3.6.2 - Volt-free contact on/off/cooling/heating without
multiplexing
If the automatic heating/cooling changeover function is not
selected (see sections 4.3.11.3, 5.1 and 5.2) the operation of
contacts 1 and 2 is as follows:
OFF
Contact 1 Open
Contact 2 -
Contact status not significant
3.6.3 - Volt-free contact on/off/cooling/heating with
multiplexing
If the automatic heating/cooling changeover function is
selected (see sections 4.3.11.3, 5.1 and 5.2) the operation of
contacts 1 and 2 is multiplexed:
OFF ON cooling
Contact 1 Open Closed
Contact 2 Open Open
NOTE: The automatic changeover function (ON auto) selects
the cooling or heating mode based on the outdoor
temperature (see section 5.2).
3.6.4 - Demand limit or setpoint volt-free contact for single-
circuit units
On single-circuit units contact 3 determines the selection of
demand limit or setpoint, based on the configuration (see User
Configuration 1 menu).
Demand limit selection
100% Limit 1
(no limit)
Contact 3 Open Closed
8
ON cooling ON heating
Closed Closed
Open Closed
ON heating ON auto
Closed Open
Closed Closed
Setpoint selection
Setpoint 1 Setpoint 2
Open Closed

3.6.5 - Demand limit volt-free contact for dual-circuit units

On dual-circuit units the operation of the demand limit
selection contacts is multiplexed. The demand limit setpoints are
adjustable in the setpoint menu (see section 4.3.8).
100% Limit 1
(no limit)
Contact 3 Open Closed
Contact 4 Open Open
3.6.6 - Water setpoint selection volt-free contact with
multiplexing for dual-circuit units
On dual-circuit units the operation of the cold water or hot
water setpoint selection contacts is multiplexed. The set-points
are adjustable in the setpoint menu (see section 4.3.8). Auto
means that the active setpoint is determined by the setpoint
schedule (see section 5.6.1).
Cooling mode
Setpoint 1
Contact 5 Open
Contact 6 Open
Heating mode
Setpoint 1
Contact 5 Open
Contact 6 Open
Limit 2 Limit 3
Open Closed
Closed Closed
Setpoint 2 Setpoint 3 Auto
Open Closed Closed
Closed Open Closed
Setpoint 2 Setpoint 3 Auto
Open Closed Closed
Closed Open Closed