heat-timer EPU-D - Page 17

InstallationInstructions17
059840‐00Rev.AHeat‐TimerCorp.
WiringtoaMotorizedValve
NOTE:TheEPU‐Ddoesnotsourcepowertothemotorizedvalve
terminals.Anexternal24Vdcpowersourceisrequiredandmustbe
connectedinseries,asshowninthediagram.
1. Runthemotorizedvalvesignalwiringthroughaknockoutlocatedon
thebottomoftheEPU‐Denclosure.
2. ConnectthemotorizedvalveCloseterminaltoterminal6onthe
EPU‐D.
3. ConnectthemotorizedvalveOpenterminaltoterminal8onthe
EPU‐D.
4. Connecta24Vactransformerpowersource.
a. Runatransformerwirethroughaknockoutlocatedonthebottom
oftheEPU‐Denclosureandconnectterminal7ontheEPU‐Dtoa
transformer24Vacterminal.
b. ConnectthemotorizedvalveCommonterminaltoatransformer24Vacterminal.
WiringtoaBoiler
NOTE:TheEPU‐Ddoesnotsourcepowertotheboilerterminals.Wiretheburner
outputinserieswiththeboilerlimitcircuit.
1. Runtheburnerenablesignalwiresthroughaknockoutlocatedonthebottomof
theEPU‐Denclosure.
2. Connectaburnerenableterminalstoterminals7and8ontheEPU‐D.