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Fig. 27: MODE 1 - Master/Slave with Primary/Secondary Piping
Operational Settings
• Operation Mode parameter in ADJUST menu must be set to 1 (refer to
Settings
on page 57 for parameter settings and
• Heater A VERSA control board DIP switch 2 must be set to ON (Master). Heaters B, C and D VERSA
control board DIP switch 2 must be set to OFF (slave). Refer to Cascade System Connections on
page 77.
• Set auto reset high limit switch to 90ºC (194ºF) on each heater.
• The PIM operator setpoint dial on each heater MUST also be set to
the Setpoint temperature to prevent an over temperature condition
from occurring when operating in limp mode.
Mode 1 for Hydronic Systems without DHW – ADJUST Menu Settings
• 'Default' column shows factory default settings. Actual values will depend on installation. Required
(Rqd) values shown bracketed in bold must not be exceeded.
• Parameters can only be changed if VERSA control board DIP switch 1 is set to ON (up).
• Some parameters are only available if controlling parameter/device is set as indicated in
'Description'.
Parameter
Range
Operation
1, 2, 3
Mode
SETP, RSET,
Target Mode
EMS, Modbus
Target
10.0 ~
Setpoint
115.0°C
32 .0~
Target Max
110.0°C
Target Min
10.0 ~ 82.0°C
Adjust Menu
Selects heater operating mode
SETP = Setpoint
RSET = Outdoor Reset (outdoor air compensation)
EMS = Energy Management System (if PIM DIP switch 5 is
ON - Default DIP 5 setting is OFF)
Modbus only if Modbus Mode para = Temp or Rate)
Target setpoint (only avail if Target Mode para = SETP)
Max heating value for indirect DHW @ 10.0vdc input when
Target Mode para = EMS or Modbus
Min heating value for indirect DHW @ 1.0vdc input when
Target Mode para = EMS or Modbus
57
on page 88).
Description
Mode 1 ADJUST Menu
Default (Rqd)
1
SETP
82.0°C
(80ºC Max)
98.0°C
(82.0ºC Max)
10.0°C
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