tekmar 667 Snow Detector & Melting Control - Manual (Page 16)

© 2002 D 667 - 09/02 16 of 28
System Pump (System Pmp 2 )
If a pump is connected to the System Pmp 2 terminals (17 and 18), make sure power to the pump circuit is off and install a
jumper between the System Pmp 2 terminals (17 and 18). When the circuit is p owered up, the p ump should turn on. If no
response occurs, check the wiring between the terminal and the pump and refer to any installation or troubleshooting informa-
tion supplied with the pump. If the pump operates properly, disconnect the power and remove the jumper.
Boiler
If the boiler circuit is connected to the Boiler terminals (19 and 20), make sure power to the boiler circuit is off, and install a
jumper between the terminals. When the boiler circuit is powered up, the boiler should fire. If the boiler does not turn on, refer
to any installation or troubleshooting information supplied with the boiler. (The boiler may have a flow switch that prevents firing
until the boiler pump is running). If the boiler operates properly, disconnect the power and remove the jumper.
Melting
If a device is connected to the Melting terminals (21 and 22), make sure power to the circuit is off, and install a jumper between
the terminals. When the circuit is powered up, the device should operate. If the device does not operate, refer to any installa-
tion or troubleshooting information supplied with the device. If the device operates properly, disconnect the power and remove
the jumper.
Variable Speed Injection Pump
If a variable speed injection pump circuit is connected to the Var and Pwr Mix terminals (1 and 2), make sure the power to the
terminal block is off and install a jumper between the Var and Pwr Mix terminals (1 and 2). When the variable speed pump
circuit is powered up, the variable speed pump should operate at full speed. If the pump does not operate, check the wiring
between the terminal block and the pump and refer to any installation or troubleshooting information supplied with the pump.
If the pump operates properly, disconnect the power and remove the jumper.
Connecting The Control
Make sure all power to the devices and terminal blocks is off, and remove any remaining
jumpers from the terminals.
Reconnect the terminal blocks to the control by carefully aligning them with their respec-
tive headers on the control, and then pushing the terminal blocks into the headers. The
terminal blocks should snap firmly into place.
Install the supplied safety dividers between the unpowered sensor inputs and the pow-
ered wiring chambers.
Apply power to the control. The operation of the control on power up is described in the
Sequence of Operation section of this brochure.
21
Sys
P1
L N Melting
22
25
Power
23 24
DIP Switch Settings
The DIP switch settings on the control are very important and should be set to the
appropriate settings prior to making any adjustments to the control through the User
Interface. The DIP switch settings change the items that are available to be viewed and
/ or adjusted in the User Interface.
LOCK / UNLOCK (FACTORY SETTING IS UNLOCK)
The Lock / Unlock DIP switch is used to lock and unlock the access level of the control and tekmar Net™ tN2 device. Once locked,
access levels can not be changed. To determine if the control is currently locked or unlocked, a small segment representing a pad-
lock is viewed in the bottom right hand corner of the display. When the padlock is closed, the access level cannot be changed.
Idle Demand
Melt Demand
Idle Demand
Melt Demand
Cleaning
The control’s exterior can be cleaned using a damp cloth. Moisten cloth with water and wring out prior to wiping control. Do no use
solvents or cleaning solutions.