Specifications

Section-2 Installation
November 11, 2013
2‐30
Copyright©2013,HarrisBroadcast
WARNING:Disconnectprimarypowerpriortoservicing. 888‐2628‐300
Note
Actual flow rate may deviate from recommended depending on site specifics like pipe diameter, number of
elbows, and run length. The flow rate must be above the trip point level in order to prevent frequent faults
and pump switches. .
Note
If the pump is unable to deliver the required flow rate, check for correct wiring of the 3 AC phases. Incor-
rect wiring of the 3-phase sequence would allow the pumps to operate but with much degraded perfor-
mance.
2.15.1.1 ConfirmationofAuto PumpSwitching
Oncetheinverter/controllerLL(lowlevel)issettheoperationofthetransmitterflowsensorcanbeconfirmedby
thefollowing:
STEP 1 SetHEpumpmoduletoRemote.
STEP 2 UseSystempageGUItoselectAutopumpcontrolmode.Thisactivates
automaticpumpswitching.
STEP 3 Turntransmitteron.
STEP 4 Reducetheflowratethroughthecabinetbyslowlyclosingthecabinet
coolantinletvalve.Whentheflowratethroughthecabinetfallsbelowthetrip
pointtheflowwarningshouldactivateandthesystemshouldswitchtothe
otherpump.
STEP 5 Gobacktothenominalflowraterecommendedforthecabinetbyslowly
openingthecabinetinletvalve.Thewarningshouldgoaway.
STEP 6 Endofprocedure.
2.15.2 HeatExchangerFanControl
Fanoperationiscontrolledbythefaninverter/controllers.Thecontrollersautomaticallychangethefanspeedbased
ontemperaturesensedintheheatexchangersupplyline.Thefansturnatalowspeedwhenthecoolant
temperatureis>30degreesC.andpowerisappliedtothetransmitterandpumpmodule.The
faninverter/
controllershavebeenprogrammedatthefactorysonosetupisrequired.
Note
If fan activation is needed to check fan rotation but the transmitter is not available, the fan inverter/con-
trollers must be set up for manual control to allow fan activation. This is accomplished by following the
procedure outlined in the HE pump module technical manual 888-2625-001 Section 3.1.4 on page 3-5.
Table2‐11TypicalTransmitterFlowRate s
QuantityofPA
Modules
MinimumCoolantFlowRateTrip
Point(LPM)
RecommendedCoolant
FlowRate(LPM)
TypicalPumpFrequency
Range(Hz)
2 10 14 15‐20
3 19 27 15‐20
4 23 32 15‐25
6 31 43 20‐30
8 38 53 25‐35
10 46 65 TBD
12 53 75 TBD
16 70 100 TBD