tekmar 557 Thermostat Installation - Manual (Page 28)

© 2014 557_D - 09/14
28 of 52 A Watts Water Technologies Company
Setup Menu (3 of 7)
Setting Display
BACKUP W2 THERMAL MOTOR
Select whether the backup stage of heat W2 operates
a thermally actuated zone valve (wax actuator). When
set to ON, there is a 3 minute delay before operating
the pump and any heat sources.
Access Level: Installer
Range: OFF or ON
Conditions: BACKUP W2 TERMINAL is set to CONV
or COIL.
Default: OFF
BACKUP W2 DELAY
The minimum amount of time that the first stage W1
and the heat pump must be operating before the
backup second stage W2 can turn on.
AUTO = Automatic PID staging
OVR = W2 only turns on when Mode is set to EMER.
Access Level: Installer
Range: AUTO, 10 to 180 min, OVR
Conditions: BACKUP W2 TERMINAL is set to CONV,
COIL, FURN, or OTHR.
Default: 60 minutes
BACKUP W2 DIFFERENTIAL
Select the backup W2 differential turn on point from
the previous heat stages.
Access Level: Installer
Range: 0.0 to 8.0°F (0.0 to 8.0°C)
Conditions: BACKUP W2 TERMINAL is set to CONV,
COIL, FURN, OTHER.
Default: 1.0°F (0.6°C)
LOCKOUT W2
The outdoor temperature above which the backup
heat W2 is disabled. When Mode is set to EMER
(emergency), the W2 is allowed to turn on.
Access Level: Installer
Range: 40 to 65°F, OFF (4.5 to
18.5°C)
Conditions: BACKUP W2 TERMINAL is set to CONV,
COIL, FURN, or OTHR.
Default: 60°F (15.5°C)
Y1 RELAY
Select the cooling equipment the Y1 relay operates.
HP1 = Heat pump
AC1 = Air conditioner
W2 = W2 turned on together with Y1. Used for 2-pipe
hot / chilled water fan coils. The backup W2 relay
activates the pump or zone valve for the fan coil
for both heating and cooling. Only available when
Backup W2 Source is set to TNK1.
Access Level: Installer
Range: HP1, AC1, W2
Conditions: Always available. Default: HP1