Replacement Parts List

ManualsBrandsField Controls ManualsBoiler Venting4" Vacuum Relief Valve

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Please retain these instructions after installation.

This device MUST be installed by a qualiﬁed agency in accordance with the manufacturer's installation instructions. The deﬁnition of

a qualiﬁed agency is: any individual, ﬁrm, corporation or company which either in person or through a representative is engaged

in, and is responsible for, the installation and operation of HVAC appliances, who is experienced in such work, familiar with all the

precautions required, and has complied with all the requirements of the authority having jurisdiction.

READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY BEFORE PROCEEDING WITH THE INSTALLATION.

Installation Date:

Installed By: Phone:

COMBUSTION AIR SYSTEM

Model: CAS-2B, 2C & 2W

This product is designed for use on the following burners, for the purpose of routing combustion air directly

to the burner, with the added safety feature of the vacuum relief valve.

NOTE: For burner inputs up to 2.0 GPH at 100 PSI input pressure

or equivalent.

The Air Boot

models CAS-2B, CAS-2C and CAS-2W are for use

only on the designated burner(s) as described in these instructions

only when the speciﬁc burner includes this Air Boot

when shipped

from the burner manufacturer, or where the burner instructions

speciﬁcally reference the models CAS-2B, CAS-2C or CAS-2W Air

Boot

as an optional air intake system.

NOTE: This product brings combustion air only to the burner; must have adequate venting air in accordance

with NFPA-31.

CAS-2B BECKETT-AF/AFG

CAS-2C CARLIN-EZ-1/CRD/FRD

CAS-2W WAYNE-MSR

4" VRV

AIR BOOT

4" IAH HOOD

ITEMS INCLUDED IN KIT:

1- Air Boot

1- Set of Gaskets

1- 4" VRV

1- 4" IAH Hood

1- Burner Coupling Set

2- Mounting Bolts

1- Flow Restrictor Pan

(CAS-2B ONLY)

INSTALLER SUPPLIED ITEMS:

Duct Piping and Elbows

Elbows;

⁄4" NPT

Female x

⁄4" NPT Male

for routing oil line

Summary of content (8 pages)

PAGE 1
COMBUSTION AIR SYSTEM Model: CAS-2B, 2C & 2W ITEMS INCLUDED IN KIT: 1- Air Boot ® 1- Set of Gaskets 1- 4" VRV 1- 4" IAH Hood 1- Burner Coupling Set 2- Mounting Bolts 1- Flow Restrictor Pan (CAS-2B ONLY) 4" IAH HOOD 4" VRV INSTALLER SUPPLIED ITEMS: Duct Piping and Elbows AIR BOOT ® 90º Elbows; 1⁄4" NPT Female x 1⁄4" NPT Male for routing oil line This product is designed for use on the following burners, for the purpose of routing combustion air directly to the burner, with the added safety
PAGE 2
THE PURPOSE OF THE VRV The Vacuum Relief Valve is a safety device to guard against combustion problems associated with directly connecting oil burners to the outside. Typical problems can be caused by blockage of the intake termination, icing up of the ductwork and effects of leeward side wind effects on a building. VRV OPERATION The VRV gate operates on changes in the vacuum pressure generated by the inlet to the oil burner. The VRV gate will remain closed during normal burner operation.
PAGE 3
2. FOR LOW FIRING RATE APPLICATIONS WITH BURNER INPUTS UP TO .75 GPH (CAS-2B ONLY) a. Insert flow restrictor pan in the inlet collar with the flat of the pan inward. (See Figure 4) b. Push the pan in all the way, approximately 5⁄8" from the air adjustment blades. (See Figure 5) Mount VRV tee assembly or 90° elbow onto the Air Boot intake. Fasten using three (3) sheet metal screws spaced 120° apart on all joints. (See Figure 6) Figure 4 3. Assemble VRV balance weight onto the gate.
PAGE 4
INLET VENT TERMINATION INSTALLATION 1. Cut a 4-1⁄4" diameter hole through the sidewall of the building. 2. Slide the inlet vent pipe through the hole and fasten to the wall with appropriate fasteners. Seal the edges of the mounting plate with a silicone sealant or equivalent.
PAGE 5
DUCTWORK INSTALLATION 1. Duct length distance, a maximum of 30 linear feet of standard duct pipe and two (2) 90° elbows at maximum firing rate. Subtract 7' from the maximum linear feet for every 90° elbow added. NOTE: Longer pipe lengths require the use of a larger pipe between the VRV and the intake hood. It also requires the use of a vent pipe increaser at the VRV and a reducer at the intake hood.
PAGE 6
AIR ADJUSTMENT 1. Adjust the air adjustment knob on the side of the Air Boot to rough air setting (See Table 2). NOTE: For proper burner operation, burner should be set up by using a combustion analysis test set. Table 2 ROUGH AIR SETTING GPH Knob Setting CAS-2B CAS-2C CAS-2W .75 25º 15º 70º 1.00 60º 25º 90º 1.50 160º 105º 135º 2. Start the burner and adjust the air control as needed to achieve the required CO2 and smoke levels.
PAGE 7
TROUBLESHOOTING PROBLEM: Low CO2 after AIR BOOT® installation. Solution: 1. Burner gaskets improperly installed. Check ring gasket to burner housing. 2. Flow restrictor pan not installed on Beckett Burners only with inputs to .75 or less. PROBLEM: Pump coupler failure or noisy right after installation. Solution: 1. Oil pump mounting bolts are over torqued or unevenly torqued. 2. Face gasket has been installed unevenly. 3. Check burner fan wheel. It may be out of balance.
PAGE 8
LIMITED WARRANTY Field Controls, LLC (“Company”) warrants that its products shall be free from defects in material and workmanship under normal use for the limited period indicated, from the date of manufacture, subject to the provisions 1-8 below. Eighteen (18) months All Field Controls Products (except for those listed below as 5 years or 90 days). Five (5) years Field Controls Direct Vent Systems (FDVS), Field Oil Vent Kits (FOVP), and ComboVents (CV).