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P a g e
Options (ES50LVS and ES90LVS)
Mode
SWITCH 1
SWITCH 2
SWITCH 3
SWITCH 4
Constant circulating fan - runs at Heat CFM rate
OFF
X
X
X
Constant low circulating fan (2)
ON
X
X
X
Multi-stage
X
OFF
X
X
Single-stage
X
ON
X
X
Normal Fan Cooling - runs at higher Cool CFM rate
X
X
OFF
X
Dehumidification Fan Cooling (3)
X
X
ON
X
Not used
X
X
X
X
Not used
X
X
X
X
(2) ES90LVS runs at 400 CFM, ES50LVS runs at 300 CFM.
(3) Fan Cooling runs at lower COOL CFM rate for 15 min. and then goes to higher rate.
SEQUENCE
OF
OPERATION
Multi-stage Operation
Thermostat calls for heat
R is connected to W
Heat generator is turned on
Auxiliary 24VAC power is turned on
Pump turns on 100%
After a 15 second delay to allow for system water to heat up coil, fan ramps up as
follows:
1.
Stage 1 - Lower HEAT CFM fan speed for 5 minutes
If a variable speed pump is installed, it runs at LO. If a standard single speed AC
pump is installed it runs at HI.
2.
Stage 2 - Medium HEAT CFM fan speed for 5 minutes
If a variable speed pump is installed, it runs at MED. If a standard single speed AC
pump is installed it runs at HI.
3.
Stage 3 - High HEAT CFM fan speed until thermostat is satisfied
If a variable speed pump is installed, it runs at HI. If a standard single speed AC
pump is installed it runs at HI.
Summary of Contents for ES50LVS
Page 15: ...14 P a g e Boiler Piping ...
