10/22/2008
5
BI302B
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.
3.
Circulating Pump
– the two screw terminals (orange wires) 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.
4.
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 Ø.2.
Electro-Stat -
(ES-24-SRO) 4 wire connection required. This is an electronic remote sensing device, remote
sensor can be up to 50 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 ¼”. 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 EH304 (with ES product) for hookup, note change in load control connection.
WARNING
VOLTAGE SEPARATION IS REQUIRED. THE 24Ø POWER AND PUMP WIRING MUST
REMAIN LEFT OF THE BOTTOM PIPE. THE THERMOSTAT WIRES AND LOAD CONTROL
WIRING (BLUE & BLUE/WHT) MUST EXIT AND REMAIN ON THE RIGHT SIDE OF THE
BOTTOM PIPE.
5.
Load Management Interrupt Control
– this Mini-Boiler product has been pre-wired and designed for a power
company load management receiver connection. This should not be altered in any manner!
A.
Remove blue jumper wire
B.
Extend or connect the two terminal screw points to the power company load control device.
As shipped, this unit is only equipped for off-peak =N.C. logic. If reversed logic is required, contact the
factory for modification.
Optional – if load management is not used, simply leave the blue wire jumper connected as shipped from
manufacturer. Also for Electro-Stat the load control connection is at the Electro-Stat “R” terminal.
6.
Zone Valve
– do
not
power from EMB internal transformer. Contractor needs to install separate 24VAC
transformer to operate zone valves. Suggest adding zone interlock control, EB-5415A . Call factory.
7.
Inspection/final check
– Verify all electrical connections are tight (including factory connections), verify there is
proper spacing between all power and electrical wire/terminals, and verify top high limit manual reset is “in”.
During shipping freight vibration there are times when the boiler vessel top manual reset high limit is “popped
out”.
WATER ADDITIVES
1.
Unless the source water is unusually poor and/or rust elements, additives are not required. It is recommended the
water source as shown on drawing BX304 comes through the household water softener.
