Kidde VM-1 Manual

Chapter 2: Smoke control system hardware
VM-1 Smoke Management Application Guide 35
Dual duct HVAC systems
Dual duct HVAC systems provide a central source of
conditioned air through a hot supply duct and a cold
supply duct serving multiple zones. Each zone has
mixing boxes to control room temperatures.
Configuring for smoke control of dual duct HVAC
systems utilizes mixing box air flows for pressurization.
Cold air ducts are often relied upon for air supply due to
their larger size.
See Table 6 below for control settings.
Multi-zone HVAC systems
Multi-zone HVAC systems provide separate air mixes for
each HVAC zone with multi-zone units.
Most systems are limited to about 12 zones due to
energy efficiency considerations.
For smoke control, multi-zone systems maximize air to
zones designated for pressurization around the fire.
Cold air ducts are often relied upon for air supply due to
their larger size.
See Table 7 below for control settings.
Variable air volume systems (VAV)
VAV systems serve multiple building zones with
conditioned air at required volumes.
Terminal units in each building zone contain dampers to
control air volume and may contain fans and heating
coils.
Damper positioning and controlling of supply and return
fans to provide maximum air volume are needed for
smoke control applications using VAV systems.
Static pressure controls must be reset to permit
maximum air flow without duct collapse or rupture.
See Table 8 on page 36 for control settings.
Table 6: Dual duct smoke control settings
Smoke zone
Adjacent zones Dual duct central system Remote zones on same dual duct system
Supply fan ON
Return fan ON
Exhaust air damper OPEN
Exhaust air damper CLOSED Exhaust air damper OPEN Exhaust air damper CLOSED
Hot duct damper CLOSED
Exhaust air damper CLOSED Outside air damper OPEN Hot duct damper CLOSED
Cold
duct damper CLOSED Hot duct damper CLOSED Return air damper CLOSED Cold duct damper CLOSED
Cold duct damper CLOSED Reset static pressure control to
maximize air flow and prevent duct
failure
Table 7: Multi-zone smoke control settings
Smoke zone
Adjacent zones Multi-zone central system Remote zones on same multi-zone system
Supply fan ON
Return fan ON
Exhaust air damper OPEN
Exhaust air damper CLOSED Exhaust air damper OPEN Exhaust air damper CLOSED
Supply air damper
CLOSED Supply air damper OPEN Outside air damper OPEN Supply air damper CLOSED
Return air damper CLOSED
Reset static pressure control to
maximize air flow and prevent duct
failure

Kidde VM-1 Specifications

General

Brand	Kidde
Model	VM-1
Category	Fire Alarms
Language	English