WarmFlo EMB-H Installation and Operation Manual

05/19/2016 5 BI308
ELECTRICAL HOOKUP
Reference drawing BH310
WARNING
DISCONNECT ALL ELECTRICAL POWER BEFORE ELECTRICALLY CONNECTING OR
SERVICING THE UNIT. FAILURE TO DISCONNECT THE ELECTRICAL POWER BEFORE
WORKING ON THIS PRODUCT CAN CREATE A HAZARD LEADING TO PERSONAL INJURY
OR DEATH.
1. Panel breaker sizes – based upon the installed unit capacity, cover page shows model
number/amps/kW, service from appropriate size panel breaker based on NEC code.
2. The EMB-H model series includes a factory provided circuit breaker. This qualifies for a local
disconnect at the product or appliance.
3. 240-Volt Power Source – route and install the proper current carrying conductors, suggested by local
codes, from service panel fuse or circuit breaker. Nameplate shows current & KW rating. Use only
copper wire within this unit enclosure or at the circuit breaker connection.
The source is either from the standard service panel or may be part of an off-peak separately metered
panel/CT metered enclosure. Consult with local utility if questions on off-peak installations.
WARNING
USE ONLY COPPER WIRE FOR CONNECTION TO THE CIRCUIT BREAKER TERMINALS
AND INSIDE THIS PRODUCT’S CABINET.
WARNING
TO AVOID THE RISK OF ELECTRIC SHOCK OR DEATH, WIRING TO THE UNIT MUST BE
PROPERLY GROUNDED. FAILURE TO PROPERLY GROUND THE UNIT CAN RESULT IN A
HAZARD LEADING TO PERSONAL INJURY OR DEATH.
NOTE: This model series is designed and equipped for 240-volt residential single phase. If this unit is
used on 208 volt, energy capacity is reduced by approximately 25% and there is a possibility of intermittent
relay operation. The installed transformer has a primary tap for 208.
4. Circulating Pump – the orange pigtail wires, at the control board cube relay, represent a switch closure
(see drawing – 10-amp maximum) to operate the circulating pump motor. Voltage for the pump must
come from a separate source. Wiring entrance must be left KO, do not combine with thermostat cable
or other control wiring.
5. Operating Thermostat – zone valve dry contact end switch is an operating contact, direct wired
thermostats include:
 Standard Mechanical – connect to control board “R” and “W”. Important! -Set thermostat
internal heat anticipator to 0.2.
 Electro-Stat (ES-24-BR) – 3-wire connection required. This is an electronic remote sensing
device, remote sensor can be up to 25 feet, cut and splice as required. Use only stranded wire,
shielded cable not required. The primary advantages include the capability for longer sensor and
the sensor itself is less than 5/16”. This means it can be installed after the slab is complete by
simply drilling a ¼” hole, 1/8” slot, etc. slightly out from an inside wall.
- R to R, W to W, C to C, green to ground
- Use drawing EH308 (with ES product) for hookup, note change in load control connection.
Comment: If using an Electro Industries zone controller or zone valve type devices, the turn-on or
operating thermostat control function will come from the zone controller W OUT.