Chrm, Flow And Pressure Drop; Water Flow Switch (Shipped Loose) - Camus Hydronics DynaFlame DFW501 Installation, Operation And Service Manual

Gas fired commercial copper tube boilers

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Installation and service manual (92 pages)

Table Of Contents

Table of Contents

When supplied with the CHRM, the DynaFlame is 95%

efficient (category II or IV appliance) which requires the use

of a special venting system fabricated from AL29-4C or

equivalent material. Only venting components listed by a

nationally recognized testing agency may be used.

This appliance may be installed with conventional, sidewall

or vertical venting. Conventional vented appliances operate

with negative pressure in the vent pipe and require a

special vent adapter to increase the flue outlet diameter.

Sidewall and vertically vented appliances operate with

positive pressure in the vent pipe and may be directly

connected to the flue outlet without the use of an increaser.

Consult the vent pipe manufacturer's instructions for

minimum clearances to combustible material for vent

components. In the absence of instructions, the minimum

clearance to combustible material is six inches.

Consult vent pipe manufacturer's instructions for proper

method of sealing vent pipe sections and fittings. In the

absence of instructions, make sure that pipe and fittings are

clean by swabbing with alcohol. Use Dow Corning 736 or

732 RTV, Polybar # 500 RTV or Sil-bond 4500 or 6500 to

seal vent pipe. Do not use other sealants or adhesives

except as expressly permitted by vent manufacturer's

instructions.

Consult vent pipe manufacturer's instructions for vent

system assembly. Follow vent pipe manufacturer's

instructions if those instructions differ from this section.

Conventional Venting

Multiple appliances may be vented into a conventional

chimney. The chimney must be lined with AL29-4C or

equivalent and a barometric damper is to be provided as

required for each appliance to control the draft.

A qualified professional using a proven vent-sizing program

with input of accurate operating parameters must properly

calculate sizing of the venting system. In applications where

flue gas temperatures are lower than can support a

Category II with conventional negative draft, it will be

determined at the venting design stage that a positive

pressure will be developed in the vent. It will then be

necessary to either provide separate vents as for Category

IV, to pressurize the boiler room, or to provide an extractor

at the chimney outlet in order to maintain a negative draft in

the chimney and allow common venting.

The chimney must be protected from down drafts, rain and

debris by using a listed chimney cap. Approval of the

installation will be at the discretion of authorities having

jurisdiction.

Sidewall and Vertical Venting

The maximum vent length is 100 equivalent feet. Vent pipe

may be run through a vertical or horizontal chase provided

that minimum clearances to combustible materials are

maintained. The vent should terminate a minimum 12

inches above grade plus normally expected snow

accumulation, or 7 feet above grade if located adjacent to

public walkways. Do not install over public walkway where

local experience indicates condensation or vapour from the

boiler creates a nuisance or hazard. Minimum 3 feet above

any forced air inlet located within 10 feet of vent

termination. Minimum 4 feet below, 4 feet horizontally or

above any door window or gravity air inlet. Minimum 4 feet

horizontally from electric meters, gas meters, regulators

and relief valves. Use appropriately designed thimbles

when passing through combustible walls or roofs. Install fire

stops where vent passes through floors, ceilings or framed

walls. The fire stop must close the opening between the

vent pipe and the structure. Locate vent terminal above

combustion air intake terminal (if used) and no closer than

2 feet vertically or horizontally. Vertical venting requires

flashing and a storm collar to prevent moisture from

entering the structure. Vertical vent termination must be at

least 2 feet plus the expected snow accumulation above the

roof penetration height.

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