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3940011 12.12
1. SYSTEM & COMPONENT DESCRIPTION
1.1 General
The ENERVEX Multiple Fireplace Exhaust System is a modulating exhaust system designed specifically
for the common venting and exhaust of multiple ISOKERN gas-fired fireplaces in residential, multi-story
buildings. The system includes an EBC 30 Control, one or more RSV fans, an ABB Variable Frequency Drive
(if applicable), an ADM automated damper, an ISOKERN IBV model fireplace and an ISOFLAMES gas log set.
Each fireplace flue connects to a common vertical vent that has a RSV fan at the termination point. The EBC30
modulates the fan speed to maintain the pre-set, negative pressure in the vent.
1.2 Component Description
a. EBC 30 Constant Pressure Regulator
The EBC 30 Constant Pressure Regulator controls the system to maintain the required pressure
set-point. The control regulates draft pressures by modulating the fan speed based on readings
from a pressure transducer (XTP2).
b. RSV Chimney Fan
The fireplace system is vented through one or more
RSV model chimney fans. If the fan operates
on 3-phase voltage, a Variable Frequency Drive (VFD) is used to modulate the fan speed. The
VFD connects in between the fan junction box and EBC 30. A single phase fan connects directly to
the add-on triac board inside the EBC 30 control box.
c. XTP2 Sensor
The XTP2 Sensor is an external pressure transducer that monitors pressure in the vertical common
vent. The transducer converts measured pressure into a corresponding voltage. This voltage is
relayed to the control to modulate the damper position and/or fan speed, thus regulating the
pressure at the set point.
d. ADM
The ADM is a motorized damper controled by a two-postition (open/close) actuator. The damper
connects to standard B-vent. If necessary, the stroke length of the actuator easily adjusts to open
less than 90
o
.
The actuator includes an auxiliary switch that ties into the burner’s thermal limit circuit, which
operates on mili-volts. When the actuator moves to its open position, the auxiliary switch
closes. When the pilot heats up the thermocouple, the limit circuit fully closes and releases the gas
valve. The circuit prevents the fireplace from operating when the damper is closed. In the event of
a mechanical or electrical failure, the auxiliary switch reverts to the normally open position
and closes the gas valve.
e. ISOKERN IBV Model Firerplace
An Isokern model IBV 36 or IBV 46 fireplace is standard for the fireplace system. The fireplaces
are made specifically for B-vent connection but can be adapted to fit other vent materials. Each
fireplace flue includes an actuator/balancing damper system that interlocks with the thermal limit
circuit of the burner, which controls the gas valve feeding the fireplace. Each fireplace is installed
with one of three iginition options: push-to start (manual), remote control pilot or electronic ignition.
