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Table 1

 

 

Routine and Preventive Maintenance Program for

Conventional Condensate P-Traps

(Prepared Per ASHRAE Guidelines 4-1993)

 

Traps located indoors or outdoors, with outdoor temperatures above freezing

1.      Frequency and Time of Inspection and Service:

(a)         For Systems That Provide Summer Cooling and Winter Heating

During Cooling Operation:

·         Annually—at initial system start-up for cooling

·         Semiannually—at initial system start-up and at second system start-up if facility is shut down annually for a week or more, e.g. schools

  During Heating Operation:

·         Biweekly—between cooling system shut-down and the beginning of winter heating

(b)         For Systems That Provide Summer Cooling and Winter Cooling

·        Semiannually—at 6-mo. intervals (one inspection must be made at system start-up, following an annual shut-down of facility for a week or more, e.g., schools)

2.      Maintenance Effort Required:

(a)         At each annual inspection (and semi-annually if need is indicated)

·         Physically remove flow-blocking algae and/or debris, or replace trap

·         Flush with water

·         Treat with EPA approved biocide and

·         Fill trap with water and add biocide tablets

(b)         At each biweekly inspection

·        Fill with water and add biocide tablets if need is indicated.

3.      Equipment and Material Needed:

(a)         Internal pipe scraper

(b)         New trap

(c)         Water hose

(d)        Biocide

4.      Estimated Time Required:

(a)         Annually and Semiannually:

·         5 min per inspection + (25 min travel time to and from maintenance shop and system site)

·         0 to 60 min per time serviced + (25 min travel time to and from maintenance shop and system site)

(b)         Biweekly:

·        5 min, per time serviced + (25 min travel time to and from maintenance shop and system site)

Traps located outdoors, with outdoor temperatures below freezing

1.      Frequency and Time of Inspection and Service:

(a)         For Systems That Provide Summer and Winter Cooling and Winter Heating

During Cooling Operation:

·         Not possible to maintain a condensate trap during winter cooling under these conditions—flowing condensate will freeze in trap, block flow, and damage trap

During Heating Operation:

·        Not possible to maintain a condensate trap during winter heating under these conditions—unless the trap is filled with water, it will not hold a seal and when filled, water will freeze and block condensate flow

 

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