tekmar 654 Snow Melting Control Installation - Manual (Page 9)

9 of 44 © 2013 654_D - 06/13
Manual Override - Maximum Heat
In hydronic application modes, the control includes a
Maximum Heat operation where the control operates the
snow melting system to maintain the maximum allowed
heating setpoints. This allows testing of the snow melting
system during warm weather. Step 1: Press and hold the Home button for 3 seconds.
Step 2: Press NEXT to navigate to the Override menu.
Step 3: Press ENTER to enter the Override menu.
Step 4: Select Manual Override to Max.
Step 5: Select the Maximum Heat Time after which the control
resumes normal operation.
Step 6: Exit the Manual Override by selecting Auto.
When operating a hydronic snow melting system, it is neces-
sary to purge and bleed all air out of the system. The control
includes a Purge operation where the System Pump as well
as pumps operated by the tekmarNet
® system are all turned
on to assist in purging air from the system.
Step 1: Press and hold the Home button for 3 seconds.
Step 2: Press NEXT to navigate to the Override menu.
Step 3: Press ENTER to enter the Override menu.
Step 4: Select Manual Override to Purge.
Step 5: Select the Maximum Purge Time after which the control
resumes normal operation.
Step 6: Exit the Manual Override by selecting Auto.
Manual Override - Purge
The snow melting system can be manually turned off and the
control remains off until manually changed back to Auto. This
allows the installer or end user to permanently disable the snow
melting system without removing power from the control. Step 1: Press and hold the Home button for 3 seconds.
Step 2: Press NEXT to navigate to the Override menu.
Step 3: Press ENTER to enter the Override menu.
Step 4: Select Manual Override to Off.
Step 5: Exit the Manual Override by selecting Auto.
Manual Override - Off
When operating an electric snow melting system, the control
includes a Test operation where the electrical heating cables
can be energized for 10 minutes after which the control
resumes normal operation. This allows testing of the electric
snow melting system during warm weather. Step 1: Press and hold the Home button for 3 seconds.
Step 2: Press NEXT to navigate to the Override menu.
Step 3: Press ENTER to enter the Override menu.
Step 4: Select Manual Override to Test.
Step 5: Exit the Manual Override by selecting Auto.
Manual Override - Test
Switch Settings
Switch Position Action
1
ON
LOCK ACCESS LEVEL
The control is locally locked and the access level cannot be changed.
Set to Lock when installation has been completed.
OFF
UNLOCK ACCESS LEVEL
The control is unlocked and the access level may be changed. Go to
the Toolbox menu to change the access level. Set to Unlock during
the installation process.
Note: tekmarNet
® system controls include a Global Lock that locks all
connected snow melt controls, and thermostats. Set the tekmarNet ®
system control to unlock to allow access level adjustment on all
connected devices.
2
ON Not used
OFF Not used
Meets Class B: ICES & FCC Part 15
Power: 24 V (ac) ±10%, 60 Hz, Class 2,
16 VA standby, 100 VA fully loaded
Relays: 24 V (ac) 2 A, 3.5 A combined
1058-01
Switch Se
ttings
www.tekmarControls.com
Designed and assembled in Canada
Lock
Unused Unlock
ON
1 2
H1220A
Snow Melting Control 654
tekmarNet Electric or Hydronic Boiler/Mixing
Back of Control
Testing the Relay Outputs ----------------------- -----------------------
The control includes an Override menu to check if the control’s
relays are operating and that the control is wired correctly to
the snow melting equipment.
Step 1: Press and hold the Home button for 3 seconds.
Step 2: Press NEXT to navigate to the Override menu.
Step 3: Press ENTER to enter the Override menu.
Step 4: Select Manual Override to Hand.
Step 5: For hydronic systems, set System Pump to On. The
system pump should now be operating.
Step 6: Set Heat Relay to On. The boiler or electric heating
cables should start heating.
Step 7: For modulating boilers change the Boiler Percent from
0 to 100%. The boiler should be firing.
Step 8: For a mixing valve or mixing injection pump, change
the Mix Percent from 0 to 100%. The mixing valve
should open or the mixing injection pump should
increase speed.
Step 9: Select the Override Time after which the control
resumes normal operation.
Step 10: Exit the Manual Override by selecting Auto.