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Manafacture: Bryant
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File name: ii569j-10.pdf
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manual abstract
Existing evaporator coil – If the existing evaporator coil may be re-used, check with the coil manufacturer to verify the coil construction is suitable for operation with the higher pressures of PuronR (R-410A). Also determine if the existing TXV valve is compatible with R-410A, replace if necessary. The minimum factory test pressure rating must be 250 psig (1725 kPa). Existing coil will need to be purged with Nitrogen to remove as much mineral oil as possible to eliminate cross contamination of oils. Acid test – If the existing system is being replaced because of a compressor electrical failure, assume acid is in system. If system is being replaced for any other reason, use an approved acid test kit to determine acid level. If even low levels of acid are detected, install a 100 percent activated alumina suction-line filter drier in addition to the replacement liquid-line filter drier. Remove the suction line filter drier as soon as possible, with a maximum of 72 hr of operation. Recommendation: Install a ball valve in the liquid line at the filter drier location when installing a suction filter in the suction line. Existing refrigeration piping – Reuse of existing refrigerant piping involves three issues: quality (strength) of existing tubing, cleanliness and tube size. Inspect all tube segments and joints for signs of damage, corrosion or poor brazing. Flush the interconnecting piping system with dry Nitrogen to eliminate as much trace of mineral oil as possible. 2 Same tube sizes are capable of handling higher flowrates (expressed as tons of cooling capacity) with Puron refrigerant compared to R- --22 at constant pressure drops. For example, a 1/2- --inch OD liquid line is rated at 33% higher tons with PuronR than with R- --22 (at 5_F pressure drop). A 1 1/8- --inch OD suction line is rated at 53% higher tons with Puron than with R- --22 (at 2_F pressure drop). Refrigeration lines selected for R- --22 use are typically oversized for Puron applications. Carefully check the existing suction line size against the table for maximum size (see Table 7); replace vertical riser segments if necessary. Check existing liquid line size against sizing data in Table 5 or 6; replace with smaller lines when feasible. Installation – 1. Remove the existing evaporator coil or fan coil and install the replacement coil when appropriate. 2. Drain oil from low points and traps in suction line tubing (and hot gas bypass tubing if appropriate) and evaporator if they were not replaced. Removing oil from evaporator coil may require purging of the tubing with dry nitrogen. 3. Unless indoor unit is equipped with a Puron® approved metering device, change the metering device to a thermal expansion valve (TXV) designed for PuronR (R-410A). 4. Remove the existing outdoor unit. Install the new outdoor unit according to these installation instructions. 5. Install a new field-supplied liquid-line filter drier at the indoor coil just upstream of the TXV or fix orifice metering device. 6. If a suction line filter drier is also to be installed, install suction line drier downstream of suction line service valve at condensing unit. CAUTION! UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Never install suction- -- line filter drier in the liquid- -- line of a PuronR system. 7. If required, install a 100% activated alumina suction line filter drier at the outdoor unit. 8. Evacuate and charge the system according to the instructions in this installation manual. 9. Operate the system for 10 hr. Monitor the pressure drop across the suction line filter drier. If pressure drop exceeds 3 psig (21kPa), replace suction-line and liquid-line filter driers. Be sure to purge system with dry nitrogen and evacuate when replacing filter driers. Continue to monitor the pressure drop across suction-line filter drier. Repeat filter changes is necessary. Never leave suction-line filter drier in system longer than 72 hr (actual time). 569J 3 4 C11097 UNIT STD. UNIT WT. CORNER A CORNER B CORNER C CORNER D CENTER OF GRAVITY UNIT HEIGHT lbs. kg. lbs. kg. lbs. kg. lbs. kg. lbs. kg. X Y Z H 569J*07A/B (MCHX) 328 149 128 58 68 31 62 28 70 32 21 [533.2] 19 [482.6] 13 [330.2] 42 3/8 [1076.0] 569J*08A/B (MCHX) 353 160 138 63 72 33 65 29 78 35 19 [482.6] 23 [584.2] 13 [330.2] 42 3/8 [1076.0] 569J*12A/B (MCHX) 418 190 165 75 85 39 78 35 90 41 23 [584.2] 20 [508.0] 15 [381.0] 50 3/8 [1279.2] 569J*14A/B (MCHX) 431 196 162 73 82 37 92 42 95 43 19 [482.6] 23 [584.2] 15 [381.0] 50 3/8 [1279.2] 569J*12D/E (MCHX) 499 226 193 88 111 50 72 38 123 56 20 [508.0] 23 [584.2] 15 [381.0] 50 3/8 [1279.2] 569J*14D/E (MCHX) 505 229 190 86 88 40 76 34 151 68 20 [508.0] 24 [609.6] 15 [381.0] 50 3/8 [1279.2] 569J*07A/B (RTPF) 389 176 141 64 96 44 62 28 91 41 18 [457.2] 24 [609.6] 21 [533.4] 42 3/8 [1076.0] 569J*08A/B (RTPF) 391 177 142 64 96 44 62 28 91 41 18 [457.2] 24 [609.6] 21 [533.4] 42 3/8 [1076.0] 569J*12A/B (RTPF) 490 222 177 80 120 ...