Krom Schroder GIK Series User Manual

3
T-Product · GIK, GIK..B · 2004 November
M
* Cross connection line should be no smaller than ¼“ pipe or 3/8”
OD tubing, as short and with as few bends as possible.
Application
GIK Regulators hold constant gas/air ratios as cross-
connected ratio regulators with modulating or high-low
control of nozzle mix burners or as zero governors on
premix systems.
When used as cross-connected regulator for nozzle mix
burners, GIK regulator provide outlet gas pressure at a
1:1 pressure ratio with air loading. For leaner or richer low
fire ratios, the bias spring can be adjusted to provide an
outlet pressure up to 1.2” WC (3 mbar) higher or lower
than the loading pressure.
For repeatable control of extremely small low fire inputs
(frequently, only the pilot), the GIK..B Regulator, with
a fixed internal Bypass (1/2” to 2”), is recommended.
When the system drives to low fire, the regulator valve
closes completely, and the low fire gas flow is controlled
accurately by precision-machined internal orifice.
Typical air and gas piping layouts for nozzle-mixing and
premix systems are shown in the pictures “Nozzle Mix
Burners” and “Premix Burners”. These schematics
contain only those components related to the gas-air
ration control system. A complete combustion sys-
tem must also contain a suitably-sized combustion air
source and safety-related components, such as safety
shutoff valves, air and gas pressure switches and flame
supervisor components. Consult the latest versions of
the standards which apply to your installation, such
as NFPA 86 or CAN/CGA-B149.1, for guidance. If in
doubt about which components are required, contact
Kromschroder for assistance.
Nozzle Mix Burners with High-Low Control, including Pulse Firing
Manual
Shutoff Valve
Orifice
GIK..B
Flexible Gas
Connection
Orifice
Orifice
Safety Shutoff Valve,
Slow Opening
Automatic Air
Control Valve
Cross-connection
Line*
To Other Zones
GAS
AIR
Nozzle Mix Burners with Modulating Control
Manual
Shutoff Valve
Orifice
GIK
Flexible Gas
Connection
Orifice
Manual
Air Trim
Valve or
Orifice
Safety Shutoff Valve,
Slow Opening
Motorized Zone
Air Control Valve
Cross-connection
Line*
To Other Zones
GAS
AIR
To Other Zones

Krom Schroder GIK Series Specifications

General

Brand	Krom Schroder
Model	GIK Series
Category	Controller
Language	English