Features
Overview • 3
1
Overview
The Pulse Modulating Anti-Sweat Control (PMAC II,
P/N 851-1000
), shown in
, is a solid state, anti-
sweat heater controller designed to dramatically reduce the
cost of operating anti-sweat heaters on low-temperature
door-type cases found in most supermarkets.
Normally, anti-sweat heaters operate continuously with
no controls, even though 100% operation is required only
when in-store humidity levels are high. A PMAC II pro-
vides a means for pulsing power to the heaters based on en-
vironmental conditions, so that heaters will be on for less
time during periods where the in-store dewpoint is low.
This reduces operating costs by limiting heater operation,
and increases heater life by limiting heat cycle fatigue since
the heaters are rarely turned off completely.
Depending on the model selected, the PMAC II may
have 16, 20, or 28 heater channels available. Each channel
supports a load of up to 16 amps.
The PMAC II relies on a site controller to control anti-
sweat heater ON percentage based on the in-store dew-
point. The PMAC II panel is compatible with the Building
Environmental Control (BEC), Refrigeration Monitor and
Case Control (RMCC), and Einstein RX or BX, or an E2
site controllers.
The RMCC is capable of controlling up to eight heater
circuits in a single zone, while the BEC allows PMAC II-
controlled heater circuits to be operated in two separate
zones. Two-zone control allows heaters in higher humidity
zones, such as door cases near prep rooms, to be controlled
separately from other case heaters. An E2 RX or BX can be
configured with up to eight zones.
1.1.
Features
• Full Solid-State Control
• Quiet Operation
• Easily added to existing systems
• Remote communications through the BEC, RMCC,
Einstein RX/BX, or E2 controllers
• Controlled by the store environment (humidity and
temperature)
• Centrally-located panel
• Easy installation
Figure 1-1
- PMAC II Detail
