User manual TJERNLUND WHKE MILLIVOLT INTERLOCK KIT (COMPATIBLE WITH UC1 CONTROL) 8504108 REV 0802

[. . . ] On 750 Millivolt (power pile) heaters, wire Linear Limit spill switch in series with high limit (ECO) of heater. Using cable routing tabs from wire routing packet, attach Linear Limit control cable to appliance maintaining a safe distance from hot surfaces, e. g. appliance vent pipe and hot water pipes. LINEAR LIMIT SPILL SWITCH 950-0470 (JA1) THERMOCOUPLE JUNCTION ADAPTER GAS PRESSURE SWITCH INSTALLATION The gas pressure switch is mounted on the casing of the water heater adjacent to the heater's thermostat/gas control valve. It should be mounted close enough so that the supplied 1/4" tubing will reach from the gas pressure switch fitting to the thermostat/gas valve pressure tap port. [. . . ] Wire WHKE Gas Pressure Switch across A and B terminals on UC1, MAC1E or MAC4E. Do not supply voltage to A and B terminals. Wire WHKE Linear Limit in series with thermocouple junction adapter or high limit ECO of heater. Make sure RED voltage jumper on UC1, MAC1E or MAC4E is in the DRY position. If not previously completed, connect 115 VAC supply voltage to L & N terminals on UC1. Crimp Ground wire to grounding spade terminal in UC1. Important: Installer must supply overload and disconnect protection. If not previously completed, connect ground from UC1 whip to Venter ground. Connect Black and White leads from UC1 whip to Venter motor leads. Connect Blue and Yellow leads from UC1 whip to Venter Fan Prover switch. Prover Leads are not polarity sensitive. If using a Draft Inducer and only venting millivolt appliances the PS1505 Fan Proving Switch is not necessary, see below for further information. DRAFT INDUCERS WITH ONLY MILLIVOLT APPLIANCES (PS1505 FAN PROVER NOT REQUIRED) When venting only millivolt gas control(s) with a draft inducer, the PS1505 fan prover is not necessary. It will, however, be necessary to "jumper" the P1 and P2 terminals on the UC1 Universal Control. Remove the call jumper across J1 and J2 and place it across P1 and P2 on the UC1. Deactivate the Prover Status Check circuit by pushing the #9 dip switch up, or to the "deactivated" position in the UC1 Universal Control. See "Prover Status Check Dip Switch Settings" in the Venter or UC1 instruction manual. The P1 & P2 proving switch circuit of the UC1 cannot control the burner operation of a millivolt gas control. When using a WHKE millivolt interlock kit, the appliance safety shutdown is accomplished by the Linear Limit spill switch which detects flue gas spillage. WARNING: The P1 & P2 proving switch circuit must only be jumpered when venting strictly millivolt appliances where the safety is provided by the Linear Limit. HS-SERIES POWER VENTERS WITH ONLY MILLIVOLT APPLIANCES (FAN PROVING SWITCH PROVIDED) When venting only millivolt gas control(s) with an HS-Series power venter connect Fan Prover leads as outlined above in step 5. The fan prover will not control the millivolt gas valve, but its inclusion is beneficial to proper sequencing of the UC1 control. [. . . ] Set thermostat for continuous operation. Allow fans and appliance to operate for 15 minutes. Tripping of the Linear Limit Spillage Sensor circuit during the 15 minute appliance operation indicates an unsafe operating condition. Check appliances for venting malfunction and check for adequate combustion air. [. . . ]