tekmar 654 Snow Melting Control Installation - Manual (Page 20)

© 2013 654_D - 06/13 20 of 44
The Override Menu allows an operator to manually test each relay and manually start the system.
Override Menu
Item Field Range Access Description
Hydronic
AUTO, HAND,
MAX, PRGE, OFF
Electric
AUTO, HAND,
TEST, OFF
Default = AUTO
Installer
MANUAL OVERRIDE
Manually override the normal automatic operation of the control to test
the equipment or operate the system at the maximum temperature
limits.
AUTO = Normal operation
HAND = Manual override of each relay output
MAX = Operate hydronic system at maximum heat
TEST = Operate electric system for 10 minutes
PRGE = Hydronic system purge operates pumps to help bleed air
from the system
OFF or ON
Default = OFF
Installer
SYSTEM PUMP RELAY
Manually turn on the system pump during the HAND Manual
Override.
OFF or ON
Default = OFF
Installer
HEAT RELAY
Manually turn on the heat during the HAND
Manual Override .
0 to 100%
Default = 0%
Installer
BOILER PERCENT
Manually set the modulating boiler firing rate during the HAND
Manual Override .
Conditions: Application Mode is set to Boil.
0 to 100%
Default = 0%
Installer
MIX PERCENT
Manually set the mixing valve or mixing injection pump output during
the HAND
Manual Override .
Conditions: Application Mode is set to Mix.
OFF or ON
Default = OFF
Installer
ALERT RELAY
Manually turn on the alert relay during the HAND
Manual
Override .
Conditions: Application Mode is set to PWM, Boil or Mix and Alert
Relay is set to ALRT (alert) or the Application Mode is set to Elec.
0:10 to 72:00
hours
Default = 0:10
hours
Installer
OVERRIDE TIME
Select the amount of time that the HAND
Manual Override is in effect
before returning to Automatic operation.
0:10 to 72:00
hours
Default = 24:00
hours
Installer
MAXIMUM PURGE TIME
Select the amount of time that the PURGE Manual Override is in
effect before returning to Automatic operation.
Conditions: Application Mode is set to PWM, Boil or Mix.
0:10 to 72:00
hours
Default = 24:00
hours
Installer
MAXIMUM HEAT TIME
Select the amount of time that the MAX HEAT Manual Override is
in effect before returning to Automatic operation.
Conditions: Application Mode is set to PWM, Boil or Mix.