© 2009 D 527 - 06/09 22 of 28
Thermal Motor Zone Valves
If the thermostat is operating a thermal motor (wax actuator)
zone valve, set the Thermal Motor Delay setting to On. This
provides a three minute delay to allow the zone valve to
open before the system pump is turned on. If the thermostat
operates a motorized zone valve or a zone pump, then set
the Thermal Motor Delay setting to Off. The Thermal Motor
Delay setting is located in the Adjust Menu of 528 or 530
thermostats. It is located on DIP switch 4 of a 527.
Backlight
The backlight can be adjusted using the “lite” setting. Select
Off for the backlight to remain off. Select 30 to turn on the
backlight for 30 seconds after a button is pressed. Select
On for the backlight to remain on continuously.
Zone Test
Some tekmarNet
®
System Controls include a feature called
Zone Test. This allows one zone at a time to be manually
activated. The zone test eliminates the need for the installer
to walk to the thermostat and turn up the heat in order for
the zone to turn on and activate the corresponding zone
pump or zone valve. This is useful for verifying that the
electrical wiring is correct.
If the thermostat address is selected on the tekmarNet
®
System Control, the thermostat display will show “ZONE
TEST On”. If not selected, the thermostat display will show
“ZONE TEST OFF”. The Zone Test is only available on the
Thermostat 530 when DIP switch 4 is set to hydronic.
Max Heat
The installer can use the tekmarNet
®
System Control to
turn on all heating zones and at the same time operate the
heating equipment at 100% output within temperature limits.
The thermostat operates at the temperature setting + 5°F
(3°C). This is called Max Heat. Max Heat can be manually
stopped or it can last for 24 hours and automatically resume
normal operation. Max Heat is useful in order to quickly
heat up the building in order to cure concrete, dry sheet
rock, or dry paint quickly.
The thermostat display will show “MAX HEAT” while in the
max heat operation. Max Heat is only available on Thermostat
530 when switch setting 4 is set to hydronic.
tekmarNet
®
Address
All tekmarNet
®
thermostats are automatically assigned an
address when connected in a system.
The address includes the bus number and a device number.
The bus number is only shown when connected to a
tekmarNet
®
System Control. The bus numbers available
are b (Boiler), 1, 2, 3, etc. The device number can range
from 01 to 24.
When the thermostat has an automatically set address, the
address number and “Au” will toggle back and forth.
Note: Keep track of manually set tekmarNet
®
addresses.
When a tekmarNet
®
address is manually set, thermostats
using the auto address setting will automatically be assigned
new addresses.
If two thermostats are manually set to the same address, an
error message will appear. The error remains until one of
the addresses is manually changed to a vacant address.
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